What is the number of attendance with the pre-season game as the type of record?
CREATE TABLE "canadian_football_league_attendance" (
  "type_of_record" text,
  "attendance" real,
  "date_year" text,
  "stadium" text,
  "result_games" text
);
SELECT COUNT("attendance") FROM "canadian_football_league_attendance" WHERE "type_of_record"='Pre-season game';