The example for "Kombinationen von Zeitintervallen 1 x pro Woche 1 Stück morgens" (https://ig.fhir.de/igs/medication/1.0.3/MedicationRequest-Example-MR-Dosage-comb-interval-2.html) defines one daily in the morning. In my opinion MedicationRequest.dosageInstruction[0].timing.repeat.periodUnit should be w but is d. It seems to be copy and paste from https://ig.fhir.de/igs/medication/1.0.3/MedicationRequest-Example-MR-Dosage-1000.html