To Konstantin Levin the country was the background of life, that is of pleasures, endeavors, labor.
He knew that when the time came, and when he saw his enemy facing him, and studiously endeavoring to assume an expression of indifference, his speech would flow of itself better than he could prepare it now.
Lidia Ivanovna made inquiries through her friends as to what those infamous people, as she called Anna and Vronsky, intended doing, and she endeavored so to guide every movement of her friend during those days that he could not come across them.
There are no more uses of "endeavor" in the book.
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I endeavored to get both sides to agree to a compromise.