diversify vs reskin

diversify

verb
  • To make diverse or various in form or quality; to give variety to distinguish by numerous differences or aspects. 

reskin

verb
  • To change the skin, or visual appearance, of an application. 

  • To replace the skin of a motor vehicle, especially so as to market the same car under different brands 

noun
  • Something that uses the exact same model as something else, but has superficial differences such as textures. 

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