aperiodicities

/ˌeɪ.pɪr.i.əˈdɪs.ɪ.tiz/
noun
  1. The quality or state of not occurring at regular intervals; irregular patterns.
    • Scientists study the aperiodicities of earthquakes to better understand their causes.
    • The musician used aperiodicities in the rhythm to create a sense of surprise.
    • The aperiodicities in the data made it difficult to predict future trends.
Antonyms
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