I do understand that both tenses, the Present Perfect Simple and Continuous, are used for repeated actions. I started researching the topic a long time ago and found out a lot of differences between the two. The difference that I need to ask you about is the following:
This is from Practical English Usage by Michael Swan.
I've understood from it that we don't use the Present Perfect Continuous when we say how often we have done something.
However, I came across the following sentence, yesterday, on this website: