List of Various time slots missing in the historical data for Nifty 1hour data

rvsw

Hello

I have downloaded the nifty historical data for 1 hour multiple times from 2015 onwards. I'm consistently finding the following missing values. I'm also reproducing the rest of the values for that particular day. Can you please advise on why there are gaps in the data and if there is any way to fix them? As you can see, most of the dates are in 2015 with 1 of them in 2016.

Missing 15:15
2015-09-22 09:15:00,7991.45,8021.4,7983.7,8014.8,0
2015-09-22 10:15:00,7997.55,7999.25,7979.8,7991.75,0
2015-09-22 11:15:00,7993.5,8005.05,7989.7,7998.45,0
2015-09-22 12:15:00,7960.3,7997.65,7960.0,7993.65,0
2015-09-22 13:15:00,7835.25,7964.35,7821.0,7960.7,0

Missing 14:15
2015-10-26 09:15:01,8293.0,8335.35,8292.1,8333.65,0
2015-10-26 10:15:01,8281.3,8300.5,8272.2,8292.9,0
2015-10-26 11:15:01,8278.1,8285.95,8272.65,8281.3,0
2015-10-26 12:15:01,8277.7,8284.05,8263.55,8277.85,0
2015-10-26 13:15:02,8259.9,8291.05,8254.05,8278.65,0
2015-10-26 15:15:00,8254.5,8265.0,8252.25,8259.85,0


Missing 11:15
2015-09-18 09:15:02,8026.55,8042.95,7961.25,7963.2,0
2015-09-18 10:15:16,8049.55,8054.7,8021.45,8026.05,0
2015-09-18 12:15:01,8032.05,8053.8,8023.0,8049.45,0
2015-09-18 13:15:01,8024.45,8045.15,8022.0,8032.0,0
2015-09-18 14:15:01,7983.55,8024.8,7969.1,8024.45,0
2015-09-18 15:15:01,7967.4,7983.65,7957.05,7983.1,0

Missing 15:15
2015-09-11 09:15:01,7837.9,7864.75,7820.9,7832.5,0
2015-09-11 10:15:01,7814.4,7844.5,7800.75,7838.05,0
2015-09-11 11:15:01,7811.5,7823.4,7798.95,7814.7,0
2015-09-11 12:15:01,7790.1,7820.95,7780.2,7811.7,0
2015-09-11 13:15:01,7794.5,7811.75,7777.15,7790.25,0
2015-09-11 14:15:01,7783.65,7823.0,7760.9,7794.5,0

Missing 14:!5
2015-09-07 09:15:01,7638.45,7704.5,7607.2,7690.65,0
2015-09-07 10:15:01,7625.45,7653.9,7622.0,7638.75,0
2015-09-07 11:15:01,7642.45,7657.3,7624.6,7625.3,0
2015-09-07 12:15:01,7625.1,7650.55,7624.0,7643.05,0
2015-09-07 13:15:07,7559.95,7638.95,7550.75,7623.6,0
2015-09-07 15:15:00,7552.95,7565.0,7546.35,7560.15,0

Missing 12:15
2015-09-08 09:15:00,7561.45,7598.85,7540.15,7587.7,0
2015-09-08 10:15:02,7559.6,7598.15,7542.95,7562.75,0
2015-09-08 11:15:02,7651.45,7656.05,7559.3,7559.95,0
2015-09-08 13:15:00,7686.3,7687.5,7635.45,7650.65,0
2015-09-08 14:15:00,7678.55,7720.55,7675.8,7686.55,0
2015-09-08 15:15:01,7701.85,7705.05,7670.0,7679.15,0


Missing 14:15
2015-09-04 10:15:00,7673.4,7684.15,7641.35,7667.6,0
2015-09-04 11:15:00,7668.5,7694.85,7661.85,7673.4,0
2015-09-04 12:15:00,7647.85,7675.05,7636.45,7668.9,0
2015-09-04 13:15:02,7654.25,7672.0,7627.55,7647.85,0
2015-09-04 15:15:00,7655.95,7656.05,7649.0,7655.35,0

Missing 15:15
2015-08-24 09:15:00,8033.2,8058.95,7992.7,8055.95,0
2015-08-24 10:15:01,8000.85,8033.6,7941.1,8033.1,0
2015-08-24 11:15:01,7957.25,8012.15,7951.2,8000.7,0
2015-08-24 12:15:01,7939.1,7988.0,7922.3,7957.55,0
2015-08-24 13:15:01,7853.6,7964.7,7853.6,7938.75,0

Missing 15:15
2015-07-06 09:15:00,8420.95,8443.45,8386.15,8386.15,0
2015-07-06 10:15:00,8412.35,8430.8,8402.65,8420.95,0
2015-07-06 11:15:00,8429.55,8433.25,8410.2,8412.4,0
2015-07-06 12:15:00,8459.7,8469.35,8425.65,8429.05,0
2015-07-06 13:15:00,8474.8,8476.55,8454.0,8459.2,0

Missing 12:15
2015-07-20 09:15:00,8581.3,8623.9,8571.35,8623.9,0
2015-07-20 10:15:00,8577.35,8588.15,8569.65,8581.15,0
2015-07-20 11:15:06,8567.45,8584.0,8559.1,8578.6,0
2015-07-20 13:15:00,8586.5,8586.5,8561.45,8567.5,0
2015-07-20 14:15:00,8601.2,8623.65,8584.4,8586.25,0

Missing 15:15
2015-06-25 09:15:00,8367.9,8368.4,8330.3,8336.25,0
2015-06-25 10:15:00,8365.25,8371.65,8353.15,8368.05,0
2015-06-25 11:15:00,8370.6,8372.85,8354.75,8365.0,0
2015-06-25 12:15:01,8389.55,8389.75,8363.55,8370.35,0
2015-06-25 13:15:01,8403.35,8407.25,8385.7,8389.35,0
2015-06-25 14:15:01,8415.05,8423.05,8385.2,8403.35,0

Missing 11:15
2015-06-23 09:15:00,8389.6,8390.45,8335.75,8377.45,0
2015-06-23 10:15:02,8374.0,8398.35,8350.1,8391.15,0
2015-06-23 12:15:00,8382.55,8388.4,8373.6,8374.35,0
2015-06-23 13:15:01,8373.5,8396.6,8368.05,8382.4,0
2015-06-23 14:15:01,8384.75,8392.25,8372.4,8373.25,0