estate tax vs property tax

estate tax

noun
  • A tax based on the value of the property of a deceased person, and charged on the personal representatives of the deceased. 

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. 

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