Calculate Total Time accumulation based on specific data conditions.

Hi,

Seems like there should be simple solution to this but something is not obvious to me.

I have a table with timestamped data. How do I calculate the total duration of time when specific conditions are meet (i.e. the data in the 2nd columen is equal to a certain number)?

"2019-04-04 02:55:32.277" 5

"2019-04-04 02:55:37.287" 5

"2019-04-04 02:56:11.277" 3

"2019-04-04 02:56:12.277" 3

"2019-04-04 02:56:17.267" 3

"2019-04-04 02:56:18.283" 5

"2019-04-04 03:00:06.107" 5

"2019-04-04 03:00:07.103" 5

"2019-04-04 03:01:07.133" 3

"2019-04-04 03:01:08.130" 5

Thanks