liken vs parallelize

liken

verb
  • To compare; to state that (something) is like (something else). 

parallelize

verb
  • To treat as if parallel; to draw parallels between. 

  • To make to execute in parallel. 

  • To make parallel (to each other). 

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