approximate vs circumambient

approximate

adj
  • Approaching; proximate; nearly resembling. 

  • Nearing correctness; nearly exact; not perfectly accurate. 

verb
  • To come near to; to approach. 

  • To carry or advance near; to cause to approach. 

  • To estimate. 

circumambient

adj
  • Surrounding. 

  • Including all aspects of; encompassing. 

adv
  • in a circumambient manner 

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