cut down vs truncate

cut down

verb
  • To bring down by cutting. 

  • To insult, to belittle. 

  • Used other than figuratively or idiomatically: see cut, down. 

  • To reduce the amount of something. 

truncate

verb
  • To shorten (something) by, or as if by, cutting part of it off. 

  • To shorten (a decimal number) by removing trailing (or leading) digits. 

  • To replace a corner by a plane (or to make a similar change to a crystal). 

adj
  • Truncated. 

  • Having an abrupt termination. 

How often have the words cut down and truncate occurred in a corpus of books? (source: Google Ngram Viewer )