Frictional unemployment refers to a type of unemployment in which the person is "between jobs." This means that the person is spending time transitioning from one job to another one. It can also refer to the time during which a person is searching for a new job. This would be the case of a pumbler who quits one job and moves to another place to find another job. This can be caused by several factors, including looking for better opportunities, higher wages or a more satisfactory opportunity.
Frictional unemployment is known to be a type of unemployment that happen when employees move from one job to another or leave a job and go in search of job in another country. Furthermore, it is the time frame it takes workers in searching for or getting a job. Thus, frictional unemployment can happen due to workers looking for higher wages, salary, better benefit and so on.