immovable property vs leasehold

immovable property

noun

  • Real estate. 

leasehold

noun

  • A leasehold estate in land. 

  • Real property held as an estate in land of this type. 

adj

  • Of an estate in land, held for a term of years absolute by a lessee or tenant. 

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