“Sedulously” — Consistently, persistently and with dedication.
Its use in issues of privilege:
R. v. National Post, 2010 SCC 16 (CanLII),  1 SCR 477
“A promise of confidentiality will be respected if … the relationship is one which should be sedulously fostered in the public good … ”
Tower v. M.N.R., 2003 FCA 307 (CanLII),  1 FCR 183
“The taxpayers did not show that the tax accountant-client relationship is one that in the opinion of the community ought to be sedulously fostered to the degree that would attract privilege.”