rebuff vs shape up

rebuff

verb
  • To buff again. 

  • To refuse; to offer sudden or harsh resistance; to turn down or shut out. 

noun
  • Repercussion, or beating back. 

  • He was surprised by her quick rebuff to his proposal. 

  • A sudden resistance or refusal. 

shape up

verb
  • To take shape; to transform into or become. 

  • To improve; to correct one's bad habits or behavior. 

How often have the words rebuff and shape up occurred in a corpus of books? (source: Google Ngram Viewer )