Hello,
Once the speaker has established a context in which is clear that he/she is talking about a habit, can we say?:
On Monday I usually get up at eight o’clock whilst on Tuesday I usually get up at nine o’clock.
Meaning every Monday and every Tuesday.
I want to avoid using: on Mondays and on Tuesdays, which, certainly, would be much clearer that we are making references to every Monday and every Tuesday.
Thank you
As you accept that 'on Mondays/Tuesdays' is much clearer, why are you trying to avoid saying this? Why do you want to say something that could be less clear?
Context is always important; labelling is rarely important.
"Mondays, I usually..." is another possibility.