broken record vs tautology

broken record

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

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

tautology

noun
  • Redundant use of words, a pleonasm, an unnecessary and tedious repetition. 

  • An expression that features tautology. 

  • A statement that is true for all truth values of its Boolean atoms. 

  • A statement that is true for all truth values of its propositional variables. 

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