hidrosis vs oligohidrosis

hidrosis

noun
  • Excessive sweating; excessive perspiration (more than would be expected in response to a given stimulus; especially when profuse as a symptom of disease or a side effect of a drug). 

  • The formation and excretion of sweat; sweating; perspiration; and (sometimes, more particularly) 

oligohidrosis

noun
  • Synonym of hypohidrosis. 

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