CREATE TABLE table_22184 ("Year" FLOAT, "Car number" FLOAT, "Start" FLOAT, "Qual. speed" TEXT, "Speed rank" FLOAT, "Finish" FLOAT, "Laps completed" FLOAT, "Laps led" FLOAT, "Race status" TEXT, "Chassis" TEXT)

How many years was the chassis a lotus-ford 38/7?
SELECT COUNT("Year") FROM table_22184 WHERE "Chassis" = 'Lotus-Ford 38/7'
SELECT COUNT("Year") FROM "table_22184" WHERE "Chassis" = 'Lotus-Ford 38/7'