I'm aware of the word numeracy, but writing is more art than science and "arithmetic numeracy" didn't strike the ear well (and leaving out the arithmetic qualifier would de-emphasize just how basic a numeracy I was referring to).
If all you can contribute to the conversation is pretending that stylistic choices are errors, it's probably better to contribute nothing at all.
That's fairly rich, considering that this entire thread is you telling me which words I ought to be "looking for". Fine, you win. The rest of the nation is just like you: those weeks we don't shop at "Hole Foods", we instead shop at "Trader Jo's". What's this "Wal-Mart"?
If all you can contribute to the conversation is pretending that stylistic choices are errors, it's probably better to contribute nothing at all.