monotonousness

The monotonousness of the repetition helped dull her sensations a little.

There is a profound monotonousness about its facts that baffles and defeats one's sincerest efforts to make them sparkle and enthuse.

Because he sang it, she liked its inanity and monotonousness; and most of all, it seemed to her, she loved his hopeless and adorable flatting of every note.

Now you take a condition which is present all the time, and the results of that condition will be uniform; this uniformity of result will in time become monotonous; monotonousness, by the law of its being, is fatiguing.

He finished his last plea with "the monotonousness of my crime is immeasurable, especially in the new stage of the struggle of the U.S.S.R. May this trial be the last severe lesson, and may the great might of the U.S.S.R become clear to all."