Very interesting and useful service for monitoring popular hashtags.
https://ritetag.com/best-hashtags-for/programming
Hashtag exposure per hour - 122,483
https://ritetag.com/best-hashtags-for/javascript
Hashtag exposure per hour - 278,900
https://ritetag.com/best-hashtags-for/100DaysOfCode
Hashtag exposure per hour - 151,392
https://ritetag.com/best-hashtags-for/math
Hashtag exposure per hour - 29,604
https://ritetag.com/best-hashtags-for/coding
Hashtag exposure per hour - 57,462
https://ritetag.com/best-hashtags-for/webdev
Hashtag exposure per hour - 17,175
https://ritetag.com/best-hashtags-for/NodeJS
Hashtag exposure per hour - 12,538
https://ritetag.com/best-hashtags-for/code
Hashtag exposure per hour - 14,792
https://ritetag.com/best-hashtags-for/womenwhocode
Hashtag exposure per hour - 69,029
https://ritetag.com/best-hashtags-for/womenintech
Hashtag exposure per hour - 251,829