Google Books Ngram Viewer graphs and compares the historical usage of phrases based on the datasets comprised of more than 500 billion words and their associated volumes over time in about 5.2 million books. It consists of words contained in books published between 1500 and 2008 in English, French, Spanish, German, Chinese and Russian. Although intended for a scholarly audience, this simple online tool allows anyone with a computer to plug in a string of up to five words and see a graph that charts the phrase's use over time. Type in "men,women" without the quotes and find the date that both are quoted equally.
Ngrams
