accruing vs incidental

accruing

noun
  • An amount that is accrued. 

incidental

noun
  • Minor items, not further defined. Incidental expense. 

  • Something that is incidental. 

adj
  • Entering or approaching, prior to reflection (more frequently incident). 

  • Occurring by chance. 

  • Existing tangentially, being a byproduct, a tangent, or a likely consequence. 

  • Loosely associated; of limited relevance except indirectly; only accidentally related. 

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