A native whose whole life had been spent on the planet might have shrugged?

"Perhaps I ought to spend some time on the planet and see how these Singers affect me."

We spent many happy years together on the planet you named Far Away.

If not, then I spend very little time on the planet.

That is why he has spent more than 2,400 hours on the planet in the last two years.

The others said they'd spend the night on the planet.

Some of us got to spend a day on the planet.

By now we had spent four days on the planet, and food was getting to be a major problem.

I spent less than a month on the planet, but it was a dreary month.

My father's case would be the most advanced because he spent more time on the planet than anyone else.