Word polygon each word. Further rules may be set. One letter may be highlighted, and all words made must include that letter. A minimum length for words may be set. There is always at least one word that can be made using all of the available letters, and the rules may require that a maximum length word be found. With each puzzle, a number of words to aim for is usually included as a guide, with three difficulty ratings: good, very good and excellent. Each puzzle differs in its target, depending on the letters given to work with. In Australia, "The Advertiser"
Most common words in English such as literary works, novels, academic journals, newspapers, magazines, Hansard's Parliamentary Debates, blogs, chat logs, and emails. Another English corpus that has been used to study word frequency is the Brown Corpus, which was compiled by researchers at Brown University in the 1960s. The researchers published their analysis of the Brown Corpus in 1967. Their findings were similar, but not identical, to the findings of the OEC analysis. According to "The Reading Teacher's Book of Lists", the first 25 words in the OEC make up about one-third of all printed material in English, and the first 100 words make up