Man pages matching name send in section 3tk:

send.3tk.zh_CN	debian 10 / manpages-zh
send.3tk.zh_TW	debian 10 / manpages-zh
send.3tk.en	debian 10 / tk8.6-doc
send.3tk.zh_CN	debian 11 / manpages-zh
send.3tk.zh_TW	debian 11 / manpages-zh
send.3tk.en	debian 11 / tk8.6-doc
send.3tk.zh_CN	debian 12 / manpages-zh
send.3tk.zh_TW	debian 12 / manpages-zh
send.3tk.en	debian 12 / tk8.6-doc