A crew of 200, many unemployed miners, labored for eight years on the fort.

The two labored off and on over the script for two more years.

Evolution had labored for a billion years to make this meeting possible; it could wait a little longer.

Werner continued to work until 1870, having labored for over 30 years.

You must continue the labor, as we have labored together for fifteen years.

The trust labored for more than two years to bring it all about.

That would mean 1,350 adults laboring 70 days a year for three years.

He died in Genoa, where he labored for many years.

After laboring for five years, they saw their first convert.

George labored on the novel for eight years, and before publishing it, he showed the manuscript to his siblings.