blowoff vs outfall

blowoff

noun
  • A blowing off of steam, water, etc. 

  • Something that is blown off. 

  • A fart. 

  • An outburst of temper or excitement. 

  • The explosive separation of part of a rocket etc in order to prevent its destruction and allow for retrieval 

outfall

noun
  • The point or place of discharge of a river, drain, culvert, sewer, etc.; mouth; embouchure. 

  • A quarrel; a falling out. 

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