unbreakable vs unwinnable

unbreakable

adj

  • Not able to be broken in. 

  • Resilient. 

  • Difficult or impossible to break and therefore able to withstand rough usage. 

noun

  • Something that cannot be broken. 

unwinnable

adj

  • Unable to be won. 

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