custodianship vs escrow

custodianship

noun
  • The office, or the duty of a custodian. 

escrow

noun
  • The state of property deposited with an escrow agent. 

  • In common law, escrow applied to the deposits only of instruments for conveyance of land, but it now applies to all instruments so deposited. 

  • A written instrument, such as a deed, temporarily deposited with a neutral third party (the escrow agent), by the agreement of two parties to a valid contract. The escrow agent will deliver the document to the benefited party when the conditions of the contract have been met. The depositor has no control over the instrument in escrow. 

  • Money or other property so deposited is also loosely referred to as escrow. 

verb
  • To place in escrow. 

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