Adding the number suffix –logh changes things:
(st.klingon 2/1999): 'arlogh how many times? a word that functions adverbially, made up of the question word
'ar how much? How many? and the special number suffix -logh
times (as in six times)
I wonder if 'arDIch is possible, meaning something like "what number?", "which position in a series?", or "how manyth?", and expecting an ordinal number (wa'DIch, cha'DIch, etc.) in response. German has an interrogative wievielter which, vIqawchu'chugh, has a similar meaning.
che'wI' 'arDIch ghaH Barack Obama'e'? "Which president was Obama?", expecting an answer like che'wI' loSmaH loSDIch ghaH.
qIj puH DujlIj 'arDIch? "Which of your cars was black?" (That is, which of the cars in the series of cars you've owned was black?)
QapwI' 'arDIch SoH? "What place did you come in?" (I don't know how Klingons talk about placing in a competition but QapwI' wa'DIch for "first place", QapwI' cha'DIch for "second place", might work for now. Or maybe not.)