Historic short interest:
You can go to this link to check short interest in a stock:
http://nasdaqtrader.com/Trader.aspx?id=ShortInterest
Publication schedule is here:
http://nasdaqtrader.com/Trader.aspx?id=ShortIntPubSch
Settlement Date Short Interest Percent Change Average Daily Share Volume Days to Cover
06/15/2021 23,065,947 11.24 2,328,437 9.91
05/28/2021 20,741,899 (0.54) 2,792,211 7.43
05/14/2021 20,854,878 (0.20) 1,337,813 15.59
04/30/2021 20,895,982 0.29 1,285,776 16.25
04/15/2021 20,835,484 (6.78) 1,514,333 13.76
03/31/2021 22,350,365 0.16 1,858,450 12.03
03/15/2021 22,314,403 (2.53) 1,840,394 12.12
02/26/2021 22,893,009 (14.03) 3,433,013 6.67
02/12/2021 26,628,801 (1.28) 1,515,596 17.57
01/29/2021 26,974,172 3.22 2,068,358 13.04
01/15/2021 26,132,538 (4.05) 2,237,983 11.68
12/31/2020 27,235,886 19.50 2,558,178 10.65
12/15/2020 22,791,117 10.71 2,460,173 9.26
11/30/2020 20,586,156 (3.02) 1,910,474 10.78
11/13/2020 21,228,310 13.42 2,399,751 8.85
10/30/2020 18,715,978 16.67 2,736,373 6.84
10/15/2020 16,041,652 (7.49) 4,202,811 3.82
09/30/2020 17,341,107 10.43 2,035,668 8.52
09/15/2020 15,703,514 (10.13) 2,253,070 6.97
08/31/2020 17,472,965 (0.99) 1,815,645 9.62
08/14/2020 17,648,430 (0.70) 1,634,948 10.79
07/31/2020 17,772,471 9.71 1,996,745 8.90
07/15/2020 16,199,537 (1.69) 2,202,313 7.36
06/30/2020 16,477,343 38.20 2,029,157 8.12
06/15/2020 11,923,174 (1.24) 2,232,855 5.34
05/29/2020 12,072,735 (5.79) 2,311,699 5.22
05/15/2020 12,814,765 5.74 2,296,874 5.58
04/30/2020 12,119,128 (6.70) 2,539,686 4.77
04/15/2020 12,989,019 (23.57) 2,288,671 5.68
03/31/2020 16,994,857 4.66 3,326,321 5.11
03/13/2020 16,237,859 61.75 2,383,175 6.81
02/28/2020 10,038,565 4.46 4,489,696 2.24
02/14/2020 9,609,709 (5.79) 2,130,443 4.51
01/31/2020 10,200,828 13.09 3,121,831 3.27
01/15/2020 9,019,983 (28.16) 1,972,819 4.57
12/31/2019 12,554,793 14.29 5,207,061 2.41
12/13/2019 10,985,037 29.30 2,208,991 4.97
11/29/2019 8,495,994 8.56 1,784,206 4.76
11/15/2019 7,826,143 8.95 2,026,284 3.86
10/31/2019 7,183,276 0.53 1,146,750 6.26
10/15/2019 7,145,499 4.52 1,269,342 5.63
09/30/2019 6,836,271 40.97 2,502,661 2.73
09/13/2019 4,849,495 0.14 1,401,871 3.46
08/30/2019 4,842,909 (3.46) 1,169,467 4.14
08/15/2019 5,016,602 (6.51) 2,470,784 2.03
07/31/2019 5,365,890 (22.42) 2,235,313 2.40
