circumambient vs vicinal

circumambient

adj
  • Surrounding. 

  • Including all aspects of; encompassing. 

adv
  • in a circumambient manner 

vicinal

adj
  • Of or pertaining to a neighborhood; neighboring. 

  • Describing identical atoms or groups attached to nearby (especially adjacent) atoms in a molecule. 

  • Describing subordinate planes on a crystal, which are very near to the fundamental planes in angles, and sometimes take their place. 

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