Hi Margaret,
I've been through the 1841 census for Ditcheat there is only one Jane Chinnock listed,her age is given as 12 though.
H0107/963/3 page 9.
Highbridge Farm,Ditcheat.
William Hatton,45,Farmer.
Eliza Hatton,20.
William Hatton,15
Jane Chinnock,12,Female Servant.
Sorry but it doesn't look like this will help you any further if she is your Jane.There are plenty of other Chinnock families listed in Ditcheat,if you find any more info,maybe I can help.
Sue.