divider vs lumper

divider

noun
  • A physical object for dividing up a space. 

  • A piece of card placed in a ring binder to separate groups of documents. 

  • An electronic device for separating a signal, frequency, etc., into two or more parts. 

  • One who or that which divides or separates. 

  • A device resembling a drawing compass and used to transfer measurements of length. 

  • The median (US) or central reservation (UK) of a highway or other road where traffic in opposite directions are kept separated. 

lumper

verb
  • to lumber; to plod 

noun
  • A lamprey. 

  • A militiaman. 

  • A scientist in one of various fields who prefers to keep categories such as species or dialects together in larger groups. 

  • An extra laborer hired to assist in the loading or unloading of a truck or a ship. 

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