Well, there is no exact answer to this. Ranking on the top pages of search results is not an overnight process. It requires adequate time, patience, and effort to see the results of guest posting. Plus, there are multiple factors that decide the success of guest posting. This includes :
1. Quality of content
2. DA of the website on which you have posted the content
3. Whether or not the content is user-engaging
4. How natural the link is
5. Number of guest posts you create