How to count all cells in row if text contain

[Sasha_Scrollah]

I have [done by] row in "base" its content date and user name like "12/07/2022 13:54:36 superuser@gmail.com" 

 I need  to count  how many times cells in  [done by] contain the text "superuser"  in the virtual column, tried like this but it doesn't work

COUNT(FILTER("base", [done by] = "superuser"))

Thank you