The answer is Structural unemployment.
Frictional unemployment occurs when people are temporarily between jobs or are searching for new jobs. This type of unemployment is usually short-term and is a natural part of the job search process.
Structural unemployment happens when there is a mismatch between the skills of the labor force and the jobs available. This can occur due to technological changes, shifts in the economy, or other factors that change the demand for certain skills. It is characterized by a longer duration and is more challenging to address because it often requires retraining or education.
Cyclical unemployment is related to the ups and downs of the business cycle. During periods of economic downturns or recessions, demand for goods and services decreases, leading to a reduction in the workforce. This type of unemployment is typically temporary and improves when the economy recovers.
Seasonal unemployment occurs when people are unemployed at certain times of the year because their jobs are dependent on the season. Examples include agricultural workers during the off-season or retail workers after the holiday season.
In this context, structural unemployment is the correct term for unemployment that occurs when there are not enough jobs for the number of people in the labor force due to a mismatch between skills and job requirements.