More than thirty years ago, I was fortunate enough to attend a masterclass of maestro Joe Pass at the jazz festival in Vitoria, Spain. One of the lessons that was recorded in my mind was his explanation that for him only three families of chords existed, Major, minor and dominant 7. He emphasized that for him the diminished chords were dominant 7h b9 chords.
IMHO Note b9 in major or minor chords is an erroneous note.
I do not remember ever having found a score in the Realbooks with b9 alteration in a chord other than dominant 7h.
Sorry for my english, I'm using google translator.