discontinuation vs holding pattern

discontinuation

noun
  • The act of stopping producing or supplying a product. 

  • The process of quitting a course of treatment with a drug. 

holding pattern

noun
  • Any failure to advance; useless or unproductive activity. 

  • A path taken by an aircraft waiting to land. 

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