Long term goals refer to something that someone wants to achieve in the distant future, not in the next days, not in the next weeks or months, but in future years. Long term goals are set years in the future because they comprehend more complex purposes, like buying a house for example, at least you are already rich, you will have to set that goal years in the future.
Therefore, we can say the long term goals could take 5 years to 10 years.
