I may be be wrong, but I don't think the subject line of this message refers to repeating fields.
My advice is to control the interface used for inquiring about products. Use globals for your search fields, click a button to perform the find, which also records the information on the product searched. 2 ways of recording the search come to mind:
(1) A number field in the Products db -- add 1 to it each time it is queried.
OR
(2) Another database -- create a new record each time there is an inquiry, writing the productID, date, and whatever other information you require. Your existing Inquiry db may suit this, but I'm not clear from your description what its structure actually is.
The second option would take a bit longer to set up, but would allow for better detail in reporting product queries in the long run.
cheers,
Wendy