Definition of keepership in English:

keepership

noun

See keeper

‘Charles I was the last monarch to sleep there, Cromwell wintered there, while the Earl of Linlithgow forfeited his titles and hereditary keepership by supporting the ‘Old Pretender’.’
‘Over the past decade, under the keepership of Julian Treuherz, the Walker has both broadened and focused its collecting policy.’

Pronunciation

keepership

/-ˌSHip/