1
general::
Accept something as a matter of course, not allow something to interrupt or disturb one's routine. For example, There were bound to be setbacks but Jack took them in stride. This idiom alludes to a horse clearing an obstacle without checking its stride. [c. 1900]
American Heritage Idioms
2
general::
Phrase(s): take something in (one’s) stride
Fig. to accept advances or setbacks as the normal course of events. • She faced a serious problem, but she was able to take it in her stride. • I’ll just take it in stride. • We were afraid that success would spoil her, but she just took it in stride.
McGrawhill's American Idioms And Phrasal Verbs