contact person vs point of contact

contact person

noun
  • A person in an organization whose role puts them in contact with non-members. 

  • A person with whom one has had contact; a contact. 

  • A person in an organization or group that non-members can contact in order to interact with the group; a representative whose contact details are made public. 

  • A person, such as next of kin, who should be told about someone's situation if an emergency occurs. 

  • A point person. 

point of contact

noun
  • The single person who represents an organization, for a specific task. 

  • A person who is associated with a defined Internet entity. 

  • A specific intersection; a contact point. 

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