It seems to me that there's a set of delays that lead to my inability to assess the time required for a new calendar event to show up in my Google acc and vice versa.

Could you please describe me the exact way pre's calendar synchronises with Google?

It seems to me that the following is required to get the understanding:

1) When pre syncs with google automatically.
a) Every time it connects to a wi-fi network?
b) Does it regularly synchronise during the day (connected to Wi-fi)?
c) Does it syncronise when I add/... an event?

2) What is the delay between the syncronisation and showing the changes in the pre's calendar.
I'm only asking becase just now I was waiting about 2 minutes after the sync and it helped to exit and launch the calendar again to make the new events show up.

3) What is the delay between the syncronisation and showing the changes in the google calendar.

Here as well the events aren't showed immedately and I need to sign out and in again to see them fast enough.

Could you give me and idea of the length these delays to help me stop getting angry with these two apps))

Thank you in advance)