allowance vs empty space

allowance

noun
  • A planned deviation between an exact dimension and a nominal or theoretical dimension. 

  • Permission; granting, conceding, or admitting 

  • A permissible deviation in the fineness and weight of coins, owing to the difficulty in securing exact conformity to the standard prescribed by law. 

  • Acknowledgment. 

  • A child's allowance; pocket money. 

  • Abatement; deduction; the taking into account of mitigating circumstances 

  • An amount, portion, or share that is allotted or granted; a sum granted as a reimbursement, a bounty, or as appropriate for any purpose 

  • A permitted reduction in the weight that a racehorse must carry. 

  • A customary deduction from the gross weight of goods, differing by country. 

verb
  • To put upon a fixed allowance (especially of provisions and drink). 

  • To supply in a fixed and limited quantity. 

empty space

noun
  • An unoccupied area or volume. 

  • Vacuum; a space containing nothing at all 

  • An unoccupied space where something may be stored 

  • A feeling of longing for someone or something that is gone; a sense of a thing's absence. 

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