When you say duration, this stands for the time that you will spend on doing some things. For example, you might say that a person would need to complete a certain task in about three days. This means that the duration here is for three days.
If the person would not be able to complete the task in three days, this means that he was not able to fulfill the duration of the task. Work refers to the type of task that the person has to do. There are some types of work that would require manual labor while there are also some tasks that people can do from the office.
Duration and work are words that we use in place of each other, even though it is not right. There are major differences between these two words. Duration is the total time taken to complete a task or work.
Duration is measured in hours, day, week, month, or years. Duration is not something that can be done. There are different types of duration, such as duration in music, philosophy, project management, and bond duration.
Work can be simply referred to as to set into action; work is often referred to as effort. Work can be measured in amount; there are different types of work, which include work in project management, housework, creative work, work-life, job, manual work, and paid work. Work is normally done because it is an action.