Contracts for buying less than monthly

Perhaps I'm misreading, perhaps this belongs in suggestions.

Looking at my Cargo Shuttle Corporations I notice they only use fractional amounts of certain items per month. When I look into their contracts they look to be buying full units of those items every month. Then I look into the corporations inventory and they have over 100 months in stock.

Shouldn't these corporations be able to set contracts to buy one unit but less than every month?

Yes, since corps can produce and demand in fractional amounts we should be able to contract fractional amounts. Another solution would be a repeat option, say sell 1 unit a month for 2 months and repeat every 6 months.

A while ago there was a discussion about corps purchasing from a country stockpile before placing a market order, this would also solve the problem.

I know there is a problem with large items.

As it is now, if the corporation produces less than one entire product per month, contracts are problematic to impossible.