marooning vs tergiversation

marooning

noun
  • An act of abandoning a person in a remote, deserted place. 

tergiversation

noun
  • The act of abandoning something or someone, of changing sides; desertion; betrayal. 

  • The act of evading any clear course of action or speech, of being deliberately ambiguous; equivocation; fickleness. 

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