CREATE TABLE table_22416 ("Frequency" TEXT, "Call sign" TEXT, "Branding" TEXT, "Format" TEXT, "Owner" TEXT, "Language/Rebroadcast" TEXT)

When vista radio is the owner how many call signs are there?
SELECT COUNT("Call sign") FROM table_22416 WHERE "Owner" = 'Vista Radio'
SELECT COUNT("Call sign") FROM "table_22416" WHERE "Owner" = 'Vista Radio'