When I was young, I often stayed at my grandmother's house.
Tips
usage
祖母 specifically means paternal grandmother. For maternal grandmother, use 外祖母 (wài zǔmǔ). In daily speech, 奶奶 (nǎinai) is far more common for paternal grandmother.
memory
祖 (ancestor) + 母 (mother) = the mother on the ancestor's side, i.e., your father's mother.
