before vs till

before

conj
  • In advance of the time when. 

  • Rather or sooner than. 

prep
  • In front of, according to a formal system of ordering items. 

  • In store for, in the future of (someone). 

  • At a higher or greater position than, in a ranking. 

  • Under consideration, judgment, authority of (someone). 

  • In the presence of. 

  • In front of in space. 

  • Earlier than (in time). 

adv
  • At an earlier time. 

  • In advance. 

  • At the front end. 

till

conj
  • Until, until the time that. 

prep
  • Until; to, up to; as late as (a given time). 

  • To make it possible that. 

verb
  • To develop so as to improve or prepare for usage; to cultivate (said of knowledge, virtue, mind etc.). 

  • To cultivate soil. 

  • To work or cultivate or plough (soil); to prepare for growing vegetation and crops. 

noun
  • A vetch; a tare. 

  • A cash register. 

  • glacial drift consisting of a mixture of clay, sand, pebbles and boulders 

  • manure or other material used to fertilize land 

  • A removable box within a cash register containing the money. 

  • The contents of a cash register, for example at the beginning or end of the day or of a cashier's shift. 

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