You have been on this forum for long enough (under two usernames) to know that we require full sentences in order to give our opinion.
I don't know if I can use the first username anymore, it doesn't work anymore, this is the only one I have now.
Most of the questions I ask are not from any source but what I have heard in movies, on TV, talk shows. So when I feel for example if two phrases have similar meanings I feel the need to know if they are different in any way or if they are interchangeable.
Now, I do construct my own sentences but you know I am not very good at punctuation, I do get confused with those comma splices. However, one of the moderators gave me a link to read about it, I am still confused to use them.
John had proposed Alexandra on many occasions over and over again, but Alexandra felt indifferent.
John had proposed Alexandra on many occasions again and again, but Alexandra felt indifferent.
Now in this one the first one sounds more natural to me.