Since this place is all about chord progressions, here is a PDF article discussing The Greatest Chord Progressions if anyone might be interested.
Great Chord Progressions
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It’s great. Thank you very much!
Interesting pdf, will spend some more time with it.
Could use a little proofreading, though. Page 8:
“One basic rule of songwriting and composing in general is that music awesome works in groups two and four bars.”
Say what ???
Sounds like it was translated. 
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Maybe they meant “awesome music works in groups…” 