What it sounds like
Recurring options group, Repeat frequency, radio button, not checked. [tab] Recurring options group, Number, 1, combo box.
The radios are choices in a group so (they share a name attribute and) we wrap them all in one fieldset. Since we’re using a fieldset we add a legend, but visually hide it. The contents of each radio is too complex to be a label so we use aria-label instead. In this example we don’t want to show labels for the selects, so we use aria-label there too (a visually hidden label would also work). Some non-relevant attributes in the code are omitted for brevity.
What it looks like
<fieldset>
<legend class="visuallyhidden">Recurring options</legend>
<input aria-label="Repeat frequency" type="radio" name="recurring-options" />
every
<select aria-label="Number">
<option>1</option>
<option>etc</option>
</select>
<select aria-label="Unit">
<option>day</option>
<option>etc</option>
</select>
<br />
<input aria-label="Repeat weekday" type="radio" name="recurring-options" />
on
<select aria-label="Weekday">
<option>Monday</option>
<option>etc</option>
</select>
</fieldset>