A reply or reaction to something.

प्रतिक्रिया

English Usage: Her response to the invitation was positive.

Hindi Usage: निमंत्रण के लिए उनकी प्रतिक्रिया सकारात्मक थी।

The length of time something lasts.

अवधि

English Usage: The duration of the meeting was two hours.

Hindi Usage: बैठक की अवधि दो घंटे थी।

The time taken to reply or react to a stimulus.

प्रतिक्रिया की अवधि

English Usage: The response duration to the test was measured in seconds.

Hindi Usage: परीक्षण के लिए प्रतिक्रिया की अवधि सेकंड में मापी गई।