infrequent (adj.)

• cheeseparing
• chinchy
• chintzy
• exiguous
• meager
• miserly
• niggardly
• piddling
• poor
• rare
• scant
• scanty
• scarce
• scattered
• scrimpy
• skimpy
• slim
• slow
• sparse
• spotty
• stingy
• thin
• tight
• uncommon
• unique
• unusual