Sentence:  For sale, a Kerry cow, five years old, at her <WSD>note</WSD> in May. 
Meaning of the word marked with <WSD> tags:  The giving of milk by a cow or sow; the period following calving or farrowing during which a cow or sow is at her most useful (i.e. gives milk); the milk given by a cow or sow during such a period.