3 examples of frontier's in sentences

A thousand stamps now sing their song Where we panned on the gold shot ledge, And a picture show now marks the line That once was the frontier's edge.

But on the whole the frontier's people were an honest, kindly, generous class, ready to help in trouble or need of any kind.

The varying peculiarities of the different groups of men who have pushed the frontier westward at different times and places remain stamped with greater or less clearness on the people of the communities that grow up in the frontier's stead.

3 examples of  frontier's  in sentences