Seniorship vs. Seniority
Difference Between Seniorship and Seniority
The rank or position of senior; seniority.
A measure of the amount of time a person has been a member of an organization, as compared to other members, and with an eye towards awarding privileges to those who have been members longer.It's an old-fashioned company, with parking spaces and other perks doled out on the basis of seniority.
higher rank than that of others especially by reason of longer service
the property of being long-lived