periodicity

the 'periodicity' of the sunspot cycle

Given the coincidence of this period with natural circadian 'periodicity' , interventions designed to promote sleep might focus on widening this 1-hour window to make more time available for sleep.

So how do you pick four notes that sound good no matter what order or 'periodicity' they're played in?

the 'periodicity' of the sunspot cycle

He found that when he arranged the elements in order of increasing atomic weight, similar properties were repeated at regular intervals; they displayed 'periodicity' .

In the room of the stanza, in the house of the sonnet, to which we return again and again, we are able to dance because of the formal 'periodicity' established by the line.

Blue is also, in this poem, the emblem of temporal distance, and so of the shadow side, a blue shadow, of the mindful 'periodicity' that orders our lives.