Frost's last TV series, What Sadie Did Next, had its premiere on E4 and later transferred to the late-night schedules on Channel 4.
The show, which featured Frost chatting informally with a string of her showbusiness friends, was not recommissioned after the first eight episodes.
She had hoped the new pilot would prove her worth as a serious presenter. Sources close to the production, which was untitled, had said: "It's an adult look at changing attitudes to erotica and sexuality among women of different ages, a sort of Joan Bakewell show for today."
