CREATE TABLE table_28633 ("Channel" FLOAT, "Channel name" TEXT, "Callsign" TEXT, "Signal power" TEXT, "Broadcast area" TEXT)

How many channels are there in the Greater Tokyo area?
SELECT COUNT("Channel") FROM table_28633 WHERE "Broadcast area" = 'Greater Tokyo'
SELECT COUNT("Channel") FROM "table_28633" WHERE "Broadcast area" = 'Greater Tokyo'