prototypal vs unconventional

prototypal

adj

  • Of or pertaining to a prototype 

unconventional

adj

  • Not adhering to convention or accepted standards 

  • Atypical 

  • Out of the ordinary 

noun

  • Something or someone that is unconventional. 

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