You searched for: “constancy
constancy (s) (noun), constancies (pl)
1. The condition of being stable; steadfastness in affection: The constancy in their marriage is what Kitty treasured so much after being married for 40 years.
2. A consistent quality or trait of an individual or thing: The weather in Los Angeles, for example, shows constancy in that the sun shines and is very warm or hot for about 9 months of the year!