Mahabharata 1.107.9

संवत्सरद्वयं तं तु गान्धारी गर्भमाहितम्अप्रजा धारयामास ततस्तां दुःखमाविशत्

saṃvatsaradvayaṃ taṃ tu gāndhārī garbhamāhitamaprajā dhārayāmāsa tatastāṃ duḥkhamāviśat

Our plain-language meaning of this verse is waiting for scholar review.