below vs preliminary

below

prep
  • Unsuitable to the rank or dignity of; beneath. 

  • Downstage of. 

  • Lower in spatial position than. 

  • Lower than in value, price, rank, concentration, etc. 

  • South of. 

  • Downstream of. 

adv
  • On or to a lower deck, especially as relative to the main deck. 

  • On or to a lower storey. 

  • Later in the same text. 

  • In or to a lower place. 

  • Below zero. 

preliminary

noun
  • Any of a series of sports events that determine the finalists 

  • A preparation for a main matter; an introduction. 

  • A relatively minor contest that precedes a major one, especially in boxing 

adj
  • In preparation for the main matter; initial, introductory, preparatory. 

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