The last name is conveniently distinctive, but, inconveniently, frequently drastically mistranscribed and/or misindexed. However, I went over to Steve Morse's website and used the ED tools to help me figure out where the Wakeman and Arlington addresses are in the 1920 census. My household is at neither their 1910 address nor their 1930 address. And I _still_ cannot find them.
It's all a bit of a mystery. They aren't dead or anything -- I haven't even exhausted the maybe-they-are-living-with-a-relative possibilities. I've been persisting beyond where other Z. researchers have given up for two reasons. (1) I wanted to get a little experience with the ED tools and (2) the people who are hard to find in the census often turn up in the _most_ unexpected places, and finding out why is sometimes the road to a fantastic story.
ED, if you're wondering, stands for "enumeration district". You can think of it as a "chunk" of the census below the county and above a page.