Individuals on paid leave (i.e. maternity or paternity leave) are still included in the workforce. If the individual decides that they do not want to work they would not be considered unemployed as they are not included in the workforce; they come under the heading, "People who perform full time domestic duties." Even if they decide to re-enter the workforce, they would not be considered to be frictionally unemployed as they are not in the position of changing jobs after being unemployed.