room divider vs separator

room divider

noun
  • A screen or piece of furniture placed in a way that it divides a room into separate areas. 

separator

noun
  • An object located between two or more things and hence separating them. 

  • One who separates; an agent performing the action of separating. 

  • A device for removing one substance from another, such as cream from milk. 

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