How many years had a formula of Grand Prix?
CREATE TABLE table_name_46 (year VARCHAR, formula VARCHAR)
SELECT COUNT(year) FROM table_name_46 WHERE formula = "grand prix"
### Context: CREATE TABLE table_name_46 (year VARCHAR, formula VARCHAR) ### Question: How many years had a formula of Grand Prix? ### Answer: SELECT COUNT(year) FROM table_name_46 WHERE formula = "grand prix"