1. the quality or state of being periodic; the tendency to recur at regular intervals
2. the interval of time between successive occurrences of the same state or phase in a recurring phenomenon
Usage: scientific

Examples

• The periodicity of the moon’s phases has been observed for centuries.
• Scientists study the periodicity of earthquakes in this region.
• The periodicity of her migraines made them predictable.
• Chemical elements show periodicity in their properties.
• The periodicity of the business cycle affects economic planning.
• Researchers noted the periodicity of the bird migration patterns.