I'm new to Biblical Hebrew, and hadn't tried any morph queries until today.
The HB101 course had us do a Bible Word Study on יום. I see that there's 2284 instances of that (Hebrew) lemma (and another 16 in Aramaic).
At the bottom of the lemma section, there's a link to open a Morphology Chart for יום. New discovery, but it only finds 840 instances in the LHB, and they're all plural. Why don't any singular occurrences show up in the graph?
Not understanding the issue, I start to experiment with adding morphology for the first time:
- lemma:יוֹם:1@N???? (2300 results)
- lemma:יוֹם:1@N??S? (1449 results)
- lemma:יוֹם:1@N?M?? (844 results) <-- why so few results?
- lemma:יוֹם:1@N?F?? (2 results)
I thought Hebrew nouns had to have a gender, but the singular occurrences don't turn up in the chart, or in the M/F-specified search results.
When I right-click on one of these singular occurrences (such as in Gen 1:5), I see that its morphology is @NC-SA.
I inadvertently went down this rabbit hole by clicking on the Graph link, and now I'm in this strange place.
- What does the - mean for gender? Unspecified? I thought there's no such thing as a neutral Hebrew noun. Does that mean that the gender can't be determined from the text?
- If there are these words with - gender, why isn't there a place for them in the Morphology Chart?
I appreciate that the Introduction to Biblical Hebrew course is also helping me discover what Logos is able to do, even if I inadvertently end up with more questions. 
