What does the time map in advanced cardrelationships mean?

Let us consider this cardrelationship:

As inputted, it says that each teacher can have max one day per week with lessons placed on 6-10. In other words it means each teacher will teach only once per week in the afternoon.
He/she can have any number of lesson on periods 1-5, this cardrelationship only considers the afternoon periods.

If you input the same condition without specifing the time map:

it would mean that each teacher can teach only on one day per week.