All 4 Uses

contingency
in
Anna Karenina
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This code of principles covered only a very small circle of contingencies, but then the principles were never doubtful, and Vronsky, as he never went outside that circle, had never had a moment's hesitation about doing what he ought to do.†
Part 3

contingencies = things that might happen; or things available in case events happen
Only quite lately in regard to his relations with Anna, Vronsky had begun to feel that his code of principles did not fully cover all possible contingencies, and to foresee in the future difficulties and perplexities for which he could find no guiding clue.†
Part 3
But the mistake made by him had arisen not simply from his having overlooked that contingency, but also from the fact that until that day of his interview with his dying wife, he had not known his own heart.†
Part 4 *

contingency = something that might happen; or something available in case an event occurs
Even greater was the feeling of disagreement at the bottom of his heart as to her not needing to consider the woman who was with his brother, and he thought with horror of all the contingencies they might meet with.†
Part 5

contingencies = things that might happen; or things available in case events happen

Definitions:

(1) (contingency)
a possible event, especially one people hope will not happen, or the extra plan or resources kept ready in case that event does happen
(2) (meaning too rare to warrant focus)