closing vs trench

closing

noun
  • In morphology, the erosion of the dilation of a set. 

  • The final procedure in a house sale, when documents are signed and recorded. 

  • The act by which something is closed. 

  • The end or conclusion of something. 

adj
  • Pertaining to the finish or ending of a series of events; occurring at the end or after all others. 

trench

noun
  • A long, narrow ditch or hole dug in the ground. 

  • A narrow excavation as used in warfare, as a cover for besieging or emplaced forces. 

  • A pit, usually rectangular with smooth walls and floor, excavated during an archaeological investigation. 

  • A trench coat. 

verb
  • To dig or cultivate very deeply, usually by digging parallel contiguous trenches in succession, filling each from the next. 

  • To excavate an elongated pit for protection of soldiers and or equipment, usually perpendicular to the line of sight toward the enemy. 

  • To have direction; to aim or tend. 

  • To cut; to form or shape by cutting; to make by incision, hewing, etc. 

  • To cut furrows or ditches in. 

  • To excavate an elongated and often narrow pit. 

  • To invade, especially with regard to the rights or the exclusive authority of another; to encroach. 

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