autumn vs back end

autumn

noun
  • Traditionally the third of the four seasons, when deciduous trees lose their leaves; typically regarded as being from September 24 to December 22 in parts of the Northern Hemisphere, and the months of March, April and May in the Southern Hemisphere. 

  • The time period when someone or something is past its prime. 

  • A person with relatively dark hair and a warm skin tone, seen as best suited to certain colours in clothing. 

adj
  • Of or relating to autumn; autumnal 

verb
  • To spend the autumn (in a particular place). 

  • To undergo the changes associated with autumn, such as leaves changing color and falling from trees. 

back end

noun
  • The latter end of any given time, especially the latter part of the year; autumn; late autumn. 

  • The processing of spent fuel from a nuclear reactor into reusable materials. 

  • That part of a hardware or software system that is farthest from the user; the internals rather than the user interface. 

  • Money paid on a contingent deferred basis, for example, as a proportion of the profits or revenue of a work. 

  • The rear, back, or unseen portion (of something). 

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