| Qualifier | frequency |
| Definition | frequency of the occurrence of a feature |
| Value Format | "free text" representing the proportion of a population carrying the feature expressed as a fraction |
| Example |
<INSDQualifier_value>23/108</INSDQualifier_value><INSDQualifier_value>1 in 12</INSDQualifier_value><INSDQualifier_value>0.85</INSDQualifier_value>
|