derelict vs pile-up

derelict

noun
  • A homeless and/or jobless person; a person who is (perceived as) negligent in their personal affairs and hygiene. (This sense is a modern development of the preceding sense.) 

  • Property abandoned by its former owner, especially a ship abandoned at sea. 

adj
  • Negligent in performing a duty. 

  • Abandoned, forsaken; given up by the natural owner or guardian; (of a ship) abandoned at sea, dilapidated, neglected; (of a spacecraft) abandoned in outer space. 

  • Lost; adrift; hence, wanting; careless; neglectful; unfaithful. 

pile-up

noun
  • A pile of tackling players. 

  • An accumulation that occurs over time, especially one which is not welcome. 

  • A pile of crashed vehicles due to a traffic accident. 

How often have the words derelict and pile-up occurred in a corpus of books? (source: Google Ngram Viewer )