tail end vs termination

tail end

noun
  • The last part of a period of time, event, or situation; the concluding or final part. 

  • The hindmost part of anything (a person, animal, or object), the rear end; the butt, buttocks; hindquarters, rump. 

termination

noun
  • The last part of a word; an ending, a desinence; a suffix. 

  • An induced abortion. 

  • The process of firing an employee; ending one's employment at a business for any reason. 

  • An end in time; a conclusion. 

  • An end in space; an edge or limit. 

  • An outcome or result. 

  • The ending up of a polypeptid chain. 

  • The process of terminating or the state of being terminated. 

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