CREATE TABLE table_18769 ("Saddle cloth" FLOAT, "Horse" TEXT, "Trainer" TEXT, "Jockey" TEXT, "Weight  ( kg ) " TEXT, "Barrier" FLOAT, "Placing" TEXT)

how many people work with N Rawiller
SELECT COUNT("Trainer") FROM table_18769 WHERE "Jockey" = 'N Rawiller'
SELECT COUNT("Trainer") FROM "table_18769" WHERE "Jockey" = 'N Rawiller'