How do you say "three times a week" in Latin?
For context, I want to say that I swim three times a week.
In medicine, taking a pill twice per day is bis in diē.
So on this model, three times per week would be ter in hebdomade.
(If you want to use the later word for "week" rather than the earlier/fancier one, that would be ter in septimānā.)
hebdomas, or hebdomada are late Latin for 'a week.'
'Each and every week' is Singulis hebdomadis.
Once, twice, three times, four times (in Latin) are
semel, bis, ter, quater. (like any other adverb, place it near to the verb)
After that it becomes more regular:
quotiens how many times; totiens so many times.
5x quinquiens; 6x sexiens; 7x septiens.
"Three times" is ter, but there are some options to saying "per week". The other answers have some suggestions, but mine is quaque septimana or quaque hebdomade, meaning "every week". So I would say:
Nato ter quaque septimana/hebdomade.
I swim thrice every week.
As mentioned in my answer to this question: Is there a difference between septimana and hebdomas? there is no word for "week" in Classical Latin. The other answers to your question refer to the usage of Christian authors only. So, in Classical Latin, the answer to the question would be, "it isn't possible".