{description: A categorisation for a frequency of occurence of an undesirable effect., package_name: hl7.fhir.r4b.expansions, name: UndesirablEffectFrequency, type: null, package_version: 4.3.0, class: unknown, kind: null, url: 'http://hl7.org/fhir/ValueSet/undesirable-effect-frequency', version: 4.3.0}