But it is charact - eristic that she doesn't recognise the word, suggesting 'erlang' was what you intended! Erlang, apparently is the unit for measuring the density of traffic flow. New to me. Would have been a good one for Hogwash perhaps.

Pleased to meet you, by the way!

Not sure about the connection with heuristic; according to the OED, heuristic stems from the Greek heurisko = find.

Edit: should add that 'she' is Ænigma, the spell-checker.