Sentence Correction

Need help from you guys. I am not the native English speaker. I wanna know the difference between 'demand in' and 'demand for'. Thanks!

Can anyone give me a response?

hi bowley, i can think of " demand for" and "in demand". not aware of demand in

There is a lot of demand for qualified doctors
Qualified doctors are in demand these days

noun
1 [C] ~ (for sth / that...) a very firm request for sth; sth that sb needs:
a demand for higher pay * demands that the law on gun ownership should be changed * firms attempting to meet / satisfy their customers' demands (= to give them what they are asking for)
2 (demands) [pl.] ~ (of sth) | ~ (on sb) things that sb/sth makes you do, especially things that are difficult, make you tired, worried, etc:
the demands of children / work * Flying makes enormous demands on pilots. * She shouldn't always give in to his demands.
3 [U,C] ~ (for sth/sb) the desire or need of customers for goods or services which they want to buy or use:
to meet the demand for a product * There's an increased demand for organic produce these days. * Demand is exceeding supply.

Thanks!