Most people have a gap or two in their career history. It is very common and not normally anything to worry about. There is, however, only one explanation that an employer is really going to view favourably:

★ Further training/education

Other common - and conceivably constructive - reasons include:

★ Raising a child

★ Caring for another dependent

★ Travel

But there are also reasons which will definitely be viewed negatively:

★ Inability to find a suitable position

★ Ill health