It was invented in the 1990’s after the death of Rav Moshe ZTL
It was used by Rav Dessler zt’l in a letter which refers to R’ Elchonon as “shlit”a” (1940s). It appears in S’ma (Daas baalei battim…).
More importantly, the concept, if not the terminology, goes back to Chaza’l.