<span>
Frequency range</span>
<br><span>
The frequency range of assignments or selections is indicated by the number of checked boxes:</span>
<br><span>
☐☐☐☐☐ no record of an assignment or selection yet</span>
<br><span>
☑☐☐☐☐ low</span>
<br><span>
☑☑☐☐☐ below average</span>
<br><span>
☑☑☑☐☐ average</span>
<br><span>
☑☑☑☑☐ above average</span>
<br><span>
☑☑☑☑☑ high</span>