user: Question: How many Decembers have calgary flames as the opponent?
Columns: ['Game', 'December', 'Opponent', 'Score', 'Decision', 'Record']
Types: ['real', 'real', 'text', 'text', 'text', 'text']
Sample row: [28.0, 3.0, 'Pittsburgh Penguins', '3 - 2 SO', 'Lundqvist', '18-8-2']
SQL:

assistant: SELECT COUNT("December") FROM "Table" WHERE "Opponent" = 'calgary flames';