solute vs unbothered

solute

adj
  • Relaxed; hence, cheerful, merry. 

  • Able to be dissolved; soluble. 

  • Free; liberal; loose. 

  • Not adhering; loose. 

noun
  • Any substance that is dissolved in a liquid solvent to create a solution 

unbothered

adj
  • not bothered, serene 

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