CREATE TABLE table_21193 ("Months in Malayalam Era" TEXT, "In Malayalam" TEXT, "Gregorian Calendar" TEXT, "Tamil calendar" TEXT, "Saka era" TEXT, "Sign of Zodiac" TEXT)

Name the number of gregorian calenda rof gemini
SELECT COUNT("Gregorian Calendar") FROM table_21193 WHERE "Sign of Zodiac" = 'Gemini'
SELECT COUNT("Gregorian Calendar") FROM "table_21193" WHERE "Sign of Zodiac" = 'Gemini'