The original layer of Outline of Phonology (OP2) from the early 1950s had nonwe “calculation, a sum” derived from primitive ✶notmē based on the root √NOT, where ancient tm > dm > nw (PE19/85-86 note #79). By the 1960s, Tolkien decided that ancient tm > tw, and the section where nonwe appeared was deleted (PE19/85 and note #77).

Neo-Quenya: I prefer to ignore this particular revision to Quenya phonology and would use ᴺQ. nonwë “calculation, sum, *total” for purposes of Neo-Quenya. If you prefer Tolkien’s 1960s sound changes, this word would be notwë in the later system.

Conceptual Development: The Qenya Lexicon of the 1910s had ᴱQ. qotta “sum, number, account, total” under the early root ᴱ√QOTO (QL/78).