acknowledgment vs hello

acknowledgment

noun
  • A reward or other expression or token of gratitude. 

  • The act of a person admitting a child as their own. 

  • A response (ACK) sent by a receiver to indicate successful receipt of a transmission (See Wikipedia article on transmission). 

  • A recognition as genuine or valid; an avowing or admission in legal form. 

  • The act of recognizing in a particular character or relationship; recognition of existence, authority, truth, or genuineness. 

  • A formal statement or document recognizing the fulfillment or execution of a legal requirement or procedure. 

  • An expression of gratitude for a benefit or an obligation. 

  • A message from the addressee informing the originator that the originator's communication has been received and understood. 

  • The act of acknowledging 

hello

noun
  • "Hello!" or an equivalent greeting. 

verb
  • To greet with "hello". 

intj
  • A greeting used when answering the telephone. 

  • A call for response if it is not clear if anyone is present or listening, or if a telephone conversation may have been disconnected. 

  • An expression of puzzlement or discovery. 

  • Used sarcastically to imply that the person addressed or referred to has done something the speaker or writer considers to be foolish. 

  • A greeting (salutation) said when meeting someone or acknowledging someone’s arrival or presence. 

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