aperiodicity

/ˌeɪpɪriəˈdɪsəti/
noun
  1. The quality or state of not occurring at regular intervals or periods.
    • The aperiodicity of the comet's orbit makes it hard to predict when it will appear.
    • The scientist studied the aperiodicity of the signal to understand the random noise.
    • In music, aperiodicity can create a sense of surprise and unpredictability.
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