CREATE TABLE table_18376 ("District" TEXT, "Incumbent" TEXT, "Party" TEXT, "First elected" FLOAT, "Result" TEXT, "Candidates" TEXT)

how many times was it the district illinois 18?
SELECT COUNT("Candidates") FROM table_18376 WHERE "District" = 'Illinois 18'
SELECT COUNT("Candidates") FROM "table_18376" WHERE "District" = 'Illinois 18'