read back vs reiterate

read back

reiterate

verb
  • To say or do (something) for a second time, such as for emphasis. 

  • To say or do (something) repeatedly. 

adj
  • Reiterated; repeated. 

noun
  • A tree with vertical branches alongside the main trunk and which continue to grow upwards. 

How often have the words read back and reiterate occurred in a corpus of books? (source: Google Ngram Viewer )