CREATE TABLE table_22418 ("Frequency" TEXT, "Call sign" TEXT, "Branding" TEXT, "Format" TEXT, "Owner" TEXT, "Language/Rebroadcast" TEXT)

When vista radio is the owner what is the frequency?
SELECT "Frequency" FROM table_22418 WHERE "Owner" = 'Vista Radio'
SELECT "Frequency" FROM "table_22418" WHERE "Owner" = 'Vista Radio'