aft vs tag end

aft

adv

  • At, near, or towards the stern of a vessel (with the frame of reference within the vessel). 

adj

  • located at the back of a boat, ship, or airplane 

noun

  • The stern portion of a vessel. 

tag end

noun

  • The very end. 

  • Something left over. 

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