allot vs preform

allot

verb
  • To assign or designate as a task or for a purpose. 

  • To distribute or apportion by (or as if by) lot. 

preform

verb
  • To shape something before some other operation. 

noun
  • The rough, incomplete and unused basic form of a stone tool. 

  • An object that has undergone preliminary shaping but is not yet in its final form. 

  • A word that is no longer in use, but has been reconstructed from current ones. 

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