behind vs sacrum

behind

adv
  • Behind the scenes in a theatre; backstage. 

  • At or in the rear or back part of something. 

  • So as to come after someone or something in position, distance, advancement, ranking, time, etc. 

  • So as to be still in place after someone or something has departed or ceased to exist. 

  • In a rearward direction. 

  • Backward in time or order of succession; past. 

noun
  • In the Eton College field game, any of a group of players consisting of two "shorts" (who try to kick the ball over the bully) and a "long" (who defends the goal). 

  • The rear, back-end. 

  • The buttocks, bottom, butt. 

  • A one-point score. 

  • The catcher. 

prep
  • As a result or consequence of. 

  • Responsible for, being the creator or controller of. 

  • After in developmental progress, score, grade, etc.; inferior to. 

  • After in time. 

  • In the past, from the viewpoint of. 

  • Concealed by (something serving as a facade or disguise). 

  • After in physical progress or distance. 

  • In support of. 

  • Underlying, being the reason for or explanation of. 

  • At or to the back or far side of. 

adj
  • Slow. 

  • Not advanced to the required or expected degree; overdue or in arrears. 

sacrum

noun
  • A large triangular bone at the base of the spine, located between the two ilia (wings of the pelvis) and formed from vertebrae that fuse in adulthood. 

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