How to find that in how many websites h5 & h6 is being used?

How to find that in how many websites H6 is being used?

rviscomi August 22, 2018, 12:00am 4

@zcorpan did some analysis that answers this question: Use of HTML elements

Topic		Replies	Views
Use of HTML elements Analysis	7	11560	November 6, 2018
Representative URLs for common unusual markup for investigation Analysis	8	3016	August 28, 2019
Use of deprecated HTML features on the web? Analysis	10	4181	August 8, 2019
Use of custom elements with attributes Analysis	1	1502	March 12, 2019
<html lang> values, by complete lang value (full language tag) Analysis	0	1538	July 26, 2016