Late 16th century; earliest use found in William Warner (d. 1609), poet and lawyer. From non- + sufficiency. Compare earlier non-sufficienty, non-suffisantee.
Definition of non-sufficiency in US English:
non-sufficiency
nounˌnɒnsəˈfɪʃnsi
Insufficiency.
Origin
Late 16th century; earliest use found in William Warner (d. 1609), poet and lawyer. From non- + sufficiency. Compare earlier non-sufficienty, non-suffisantee.