This is the ValueSet that contains codes in both HL7 TimingAbbreviation + 臺灣健保署藥品使用頻率值集 (https://twcore.mohw.gov.tw/ig/twcore/ValueSet/medication-frequency-hl7-tw) and HL7 TimingAbbreviation + NHI-電子處方箋-藥品使用頻率值集 (https://nhicore.nhi.gov.tw/empd/ValueSet/NHIMedicationFrequency-HL7-vs).