Collocations for availability - noun

easy, ready
the easy availability of many illegal drugs

general, wide, widespread
greater, increased, increasing
continuous, unlimited
the seemingly unlimited availability of mortgage credit

limited
land, staff, ticket, etc.

check, ensure
Check the availability of bottled water before you set off.

expand, increase, maximize
limit, reduce, restrict
They want to restrict the availability of abortions.

subject to availability
All holiday bookings are subject to availability.