CREATE TABLE table_16573 ("Character" CLOB, "Portrayed by" CLOB, "First appearance" CLOB, "Last appearance" CLOB, "Duration" CLOB, "Episodes" CLOB)

What was the duration of Robert Joy's portrayal?
SELECT COUNT("Duration") FROM table_16573 WHERE "Portrayed by" = 'Robert Joy'
SELECT COUNT("Duration") FROM "table_16573" WHERE "Portrayed by" = 'Robert Joy'