long-term use; prolonged use; long-time service
Used for extended use of drugs, medical devices, equipment, or services over a long period. Often appears in medical, technical, or product contexts.
Long-term use of this medication may increase the risk of side effects.
We developed a durable product that withstands long-term use.
長期 is an adjective meaning 'long-term' or 'long period,' while 長期使用 specifically refers to the act of using something over a long period.
常用 means 'habitual use' or 'daily use,' often for regular, repeated use, whereas 長期使用 emphasizes the duration of continuous use.
Compound of 長期 (long-term) and 使用 (use). The meaning is transparent from its components.