Man pages matching name curlopt_max_recv_speed_large in section 3:

CURLOPT_MAX_RECV_SPEED_LARGE.3.en	debian 10 / libcurl4-doc
CURLOPT_MAX_RECV_SPEED_LARGE.3.en	debian 11 / libcurl4-doc
CURLOPT_MAX_RECV_SPEED_LARGE.3.en	debian 12 / libcurl4-doc