CREATE TABLE table_18464 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" FLOAT, "Result" CLOB, "Candidates" CLOB)

Name the number of party with the incubent james william trimble
SELECT COUNT("Party") FROM table_18464 WHERE "Incumbent" = 'James William Trimble'
SELECT COUNT("Party") FROM "table_18464" WHERE "Incumbent" = 'James William Trimble'