Explanation:

Disguised unemployment or hidden unemployment is a kind of unemployment where some people seem to be employed but are actually not. ( clear from the word disguise which means attire to hide one's identity) This type usually occurs when there is overemployment in a pirticular work.
The National Sample Survey Office (NSSO) has been the key governmental agency in India at the national and state levels to study employment, unemployment and unemployment rates through sample surveys. It does not report employment or unemployment results every quarter nor every year, but generally only once every 5 years.