n. — British Columbia, Quebec, Sports
field hockey played on grass.
Type: 5. Frequency — Grass hockey, which is otherwise called field hockey, is common in Canada, most frequent in New Zealand, but rare elsewhere (see Chart 1). It is Canadian in the North American context. Within Canada, the term is most frequently used in British Columbia (see Chart 2), where it is a term of long standing (see the 1916 quotation), followed by Quebec.
See COD-2, which labels the term "Brit & Cdn (esp. BC)".
See also: hockey
Images:

Chart 1: Internet Domain Search, 27 Aug. 2012 
Chart 2: Regional Domain Search, 10 Sep. 2012