CREATE TABLE table_3093 ("Season" FLOAT, "Regular Season" CLOB, "Playoffs" CLOB, "U.S. Open Cup" CLOB, "CONCACAF" CLOB, "MLS Regular Season Record" CLOB)

Name the number of playoffs for semifinals
SELECT COUNT("Playoffs") FROM table_3093 WHERE "CONCACAF" = 'Semifinals'
SELECT COUNT("Playoffs") FROM "table_3093" WHERE "CONCACAF" = 'Semifinals'