commutable vs mutual

commutable

adj
  • Capable of being commuted. 

mutual

noun
  • A mutual organization. 

  • Either of a pair of people who follow each other's social media accounts. 

  • A mutual fund. 

adj
  • Owned by the members. 

  • Having the same relationship, each to each other. 

  • Collective, done or held in common. 

  • Reciprocal. 

  • Possessed in common. 

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