early vs incidental

early

adj
  • Arriving a time before expected; sooner than on time. 

  • Near the start or beginning. 

  • Near the start of the day. 

  • Having begun to occur; in its early stages. 

  • At a time in advance of the usual or expected event. 

  • Of a star or class of stars, hotter than the sun. 

adv
  • At a time before expected; sooner than usual. 

  • Soon; in good time; seasonably. 

noun
  • A shift (scheduled work period) that takes place early in the day. 

incidental

adj
  • Occurring by chance. 

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

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

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

noun
  • Something that is incidental. 

  • Minor items, not further defined. Incidental expense. 

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