long-established vs unconventional

long-established

adj

  • That has been in existence for a long time. 

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 long-established and unconventional occurred in a corpus of books? (source: Google Ngram Viewer )