contract period; term of a contract
Refers to the duration for which a contract is valid. Common in business, legal, and service contexts.
The contract period for this insurance is one year.
Please complete the renewal procedure before the contract period ends.
契約 means 'contract' in general, while 契約期間 specifically refers to the duration or term of the contract.
期間 means 'period' or 'term' broadly; 契約期間 narrows it to a contractual period.
Compound of 契約 (contract) + 期間 (period). A straightforward Sino-Japanese compound.