Can I talk to him?
Yes, one second/two seconds.
Are both natural responses and if yes which one is more common?
If the question is " Can I talk to him? " Are good English and used commonly. " more often.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
If the question is "Can I talk to him?" then the answer:
"Yes, one second." OR "Yes, two seconds."
Are good English and used commonly. In my experience, you will hear the reply "Yes, one second." more often.