CREATE TABLE table_name_85 (year VARCHAR, chassis VARCHAR, points VARCHAR)

Name the total number of years for chassis of maserati 250f and points less than 0
SELECT COUNT(year) FROM table_name_85 WHERE chassis = "maserati 250f" AND points < 0
SELECT COUNT("year") FROM "table_name_85" WHERE "chassis" = "maserati 250f" AND "points" < 0