CREATE TABLE table_203_250 (id DECIMAL, "name" TEXT, "type" TEXT, "r.a.  ( j2000 ) " TEXT, "dec.  ( j2000 ) " TEXT, "redshift  ( km/s ) " TEXT, "apparent magnitude" DECIMAL)

what number of irregular types are there ?
SELECT COUNT(*) FROM table_203_250 WHERE "type" = 'irregular'
SELECT COUNT(*) FROM "table_203_250" WHERE "type" = 'irregular'