exclusion vs ratification

exclusion

noun
  • An item not covered by an insurance policy. 

  • The act of excluding or shutting out; removal from consideration or taking part. 

ratification

noun
  • The act or process of ratifying, or the state of being ratified. 

  • A formal declaration of agreement to a treaty etc. 

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