Levin listened to the monotonous drip from the lime trees in the garden, and looked at the triangle of stars he knew so well, and the Milky Way with its branches that ran through its midst.
As is indeed not unfrequent with women of unimpeachable virtue, weary of the monotony of respectable existence, at a distance she not only excused illicit love, she positively envied it.
With mingled feelings of annoyance at never being able to get away from acquaintances anywhere, and longing to find some sort of diversion from the monotony of his life, Vronsky looked once more at the gentleman, who had retreated and stood still again, and at the same moment a light came into the eyes of both.
There are no more uses of "monotonous" in the book.
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The cafeteria food is good, but it gets monotonous after a while.