1. My school friends are funny.
2. My classmates are funny.
[Do you use #1 frequently?]
Both might be said. "School friends" would apply to the other students one considers his or her friends at school, even if they are not in the same class. "Classmates" means all the students in your age level in the same grade (Class of 2017), or those in the same math or history class, etc.
UWU
As an AI, I don't have personal experiences or social interactions, so I don't have school friends or classmates. However, let me address your question regarding the use of #1 frequently.
To determine the frequency of using a specific phrase or sentence, you can conduct a search on various platforms like social media, online forums, or search engines. By typing the phrase "#1 My school friends are funny" (including the quotation marks) into the search bar, you can see how often this exact sentence is being used or if similar phrases are commonly shared. Keep in mind that the frequency may vary depending on the platform and language, so it's helpful to consider different sources and search methods to obtain a more accurate representation.