help vs sustain

help

verb
  • To do something on the behalf of someone. 

  • To assist (a person) in getting something, especially food or drink at table; used with to. 

  • To provide assistance. 

  • To avoid; to prevent; to refrain from; to restrain (oneself). Usually used in nonassertive contexts with can. 

  • To provide assistance to (someone or something). 

  • To contribute in some way to. 

intj
  • A cry of distress or an urgent request for assistance 

noun
  • Action given to provide assistance; aid. 

  • Something or someone which provides assistance with a task. 

  • Documentation provided with computer software, etc. and accessed using the computer. 

  • A study aid. 

  • One or more people employed to help in the maintenance of a house or the operation of a farm or enterprise. 

  • Correction of deficits, as by psychological counseling or medication or social support or remedial training. 

sustain

verb
  • To encourage or sanction (something). 

  • To provide for or nourish. 

  • To maintain, or keep in existence. 

  • To allow, accept, or admit (e.g. an objection or motion) as valid. 

  • To keep from falling; to bear; to uphold; to support. 

  • To confirm, prove, or corroborate; to uphold. 

  • To aid, comfort, or relieve; to vindicate. 

  • To experience or suffer (an injury, etc.). 

noun
  • A mechanism which can be used to hold a note, as the right pedal on a piano. 

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