unblock vs unload

unblock

verb
  • To remove or clear a block or obstruction from. 

  • In whist, to throw away a high card so as not to interrupt one's partner's long suit. 

  • To free or make available. 

  • To enable communication again, via telephone, instant messaging, etc., with (somebody previously blocked). 

noun
  • The removal of a block or blockage. 

unload

verb
  • To remove the charge from. 

  • To reduce the vertical load factor on (an airplane's wing or other lifting surface), typically by pitching downwards toward the ground to decrease angle of attack and reduce the amount of lift generated. 

  • To remove (the load or cargo) from a vehicle, etc. 

  • To deposit one's load or cargo. 

  • To give vent to or express; to unburden oneself of. 

  • To discharge, pour, or expel. 

  • To get rid of or dispose of. 

  • To remove the load or cargo from (a vehicle, etc.). 

  • To deliver forcefully. 

  • To ejaculate, particularly within an orifice. 

  • To remove (something previously loaded) from memory. 

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