Calendar subscription refresh rate not functioning as expected

[j-ed]

Have you seen this thread which also addresses a problem with a Google calendar syncronization:

Import calendar feature - once off or does it update?

I’ve got a hopefully easy question - I have a 2 nextcloud calendars: work and personal. I also have to keep a Google calendar for work I do with others. If I use the import function on Nextcloud calendars, it imports a vcs/ics file. When I import the cal file with, e.g. 10 appointments, I presume it will not update it when it now has 15? Thanks.