If anyone is interested in how the frequency and deviation changes are related (i was), i threw this quick-n-dirty chart together this morning: https://docs.google.com/spreadsheets/d/e/2PACX-1vR6ZsthgLiQA...

It scrapes the swissgrid.ch page (with something like "curl | grep | sed > csv" in a loop), so the data is only as accurate/current as theirs…

Edit: here's the actual sheet in case you want to "fork" it – https://docs.google.com/spreadsheets/d/1i9cLeKb5Eq1IoZFOUoOk...