Google Ngram Viewer

The Google Ngram Viewer or Google Books Ngram Viewer is an online search engine that charts the frequencies of any set of comma-delimited search strings using a yearly count of n-grams found in sources printed between 1500 and 2008[ in Google\'s text corpora in English, Chinese (simplified), French, German, Hebrew, Italian, Russian, or Spanish.There are also some specialized English corpora, such as American English, British English, English Fiction, and English One Million; and the 2009 version of most corpora is also available.

The program can search for a single word or a phrase, including misspellings or gibberish.[6] The n-grams are matched with the text within the selected corpus, optionally using case-sensitive spelling (which compares the exact use of uppercase letters), and, if found in 40 or more books, are then plotted on a graph.

The Google Ngram Viewer, as of January 2016, supports searches for parts of speech and wildcards.