broken record vs reiteration

broken record

noun
  • Used other than figuratively or idiomatically: see broken, record. 

  • Someone or something that constantly repeats itself, causing annoyance. 

reiteration

noun
  • The act of reiterating. 

  • Something reiterated or restated. 

How often have the words broken record and reiteration occurred in a corpus of books? (source: Google Ngram Viewer )