CREATE TABLE table_18214 ("District" TEXT, "Incumbent" TEXT, "Party" TEXT, "First elected" FLOAT, "Status" TEXT, "Opponent" TEXT)

How many republican incumbents first elected in 1974?
SELECT COUNT("Incumbent") FROM table_18214 WHERE "Party" = 'Republican' AND "First elected" = '1974'
SELECT COUNT("Incumbent") FROM "table_18214" WHERE "First elected" = '1974' AND "Party" = 'Republican'