I found shophouse in only one online dictionary. Curiously, the word is from Malaysia. A shophouse is a shop with the shopkeeper's living quarters above it.
As for last time, that is two words. Example:
- He wasn't there the last time I went there.
That worked the last time I tried it.
The last time I used that toaster it burned the toast.
That's the last time I'll do that.
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