property tax vs real property tax

property tax

noun
  • A tax, usually ad valorem, charged on the basis of the fair market value of property. The scope of taxable property varies by jurisdiction and it may include personal property in addition to real estate. 

real property tax

noun
  • Synonym of property tax 

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