bowdlerize vs modify

bowdlerize

verb
  • To remove or alter those parts of a text considered offensive, vulgar, or otherwise unseemly. 

modify

verb
  • To be or become modified. 

  • To change part of. 

  • To set bounds to; to moderate. 

  • To qualify the meaning of. 

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