How many days a week do I need to do cycling/running training?

How many days a week should you train endurance sports such as cycling or running? During cooperation, you report your available time at the beginning of the month.
The trainer advises you on an ongoing basis what is the best number of days for you for optimal development.
To start with, you can inform the trainer about 3-5 days (as your time limits), and then adjust this amount in the following months.