CREATE TABLE table_50963 ("Title" TEXT, "Parent magazine" TEXT, "Magazine type" TEXT, "Frequency" TEXT, "Magazine run" TEXT)

How often does Dengeki girl's style come out?
SELECT "Frequency" FROM table_50963 WHERE "Parent magazine" = 'dengeki girl''s style'
SELECT "Frequency" FROM "table_50963" WHERE "Parent magazine" = 'dengeki girl\'s style'