Understanding time column for duplicate queries

I’m trying to find the cause for a slow initial load on a website…the load time can sometimes be 10 seconds initially and even after object caching kicks in and it’s cut by half, I still find it to be a bit slow.

I’m wondering if the duplicate queries have a part to play. When I clicked the option it showed me that Astra was causing some duplicate queries but I don’t know if the time shown in the time column is per call or if it’s a cumulative number of how long it took for all those duplicate queries to ran:

See this screenshot: https://prnt.sc/6f1EZV-Ayv9W