Google Books Ngram Viewer lets you look up usage of a word or a phrase in various books in their Google Books database, a “mammoth database culled from nearly 5.2 million digitized books available to the public for free downloads and online searches, opening a new landscape of possibilities for research and education in the humanities . . . It consists of the 500 billion words contained in books published between 1500 and 2008 in English, French, Spanish, German, Chinese and Russian.”
Ngram for ‘Kashmir’ in English spreads out like this: