endogenous vs within

endogenous

adj
  • Produced, originating or growing from within. 

  • Of a natural process: caused by factors within the body. 

within

prep
  • Before the specified duration ends. 

  • In the inner part, spatially; physically inside. 

  • In the scope or range of. 

adj
  • In the context of which the present document or ruling is made. 

adv
  • In or into the interior; inside. 

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