I say, and with God's help: It is recommended to visit the cemetery every week if there is no fitna (trial) associated with it; as per the hadith: "I had forbidden you from visiting graves, but now visit them." Narrated by Muslim, hadith 1977. And he says: "Peace be upon you, O dwelling of a believing people, and we, God willing, will join you. We ask God for health for us and for you." And God knows best.