allot vs set apart

allot

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

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

set apart

verb
  • To select (something or someone) for a specific purpose. 

  • To distinguish, make obvious the distinction between (two things) or of (something). 

  • Used other than figuratively or idiomatically: to separate or isolate. 

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