Letrozole time of day?

I’ve just been changed from 2.5mg to 5mg daily.

I was taking the 2.5mg around same time each evening.

Now my doctor has said I can either do one tab in the morning and one at night or I can take the 2 together, as long as I’m consistent.

What do others taking 5mg do? Is 2 at once a bit harder on your body/more side effects?