How many photos can Kodak 135 film take on Nikon fm?

Automatic film cameras usually have 36 films, but there are usually some remaining films, so manual film cameras can shoot 37~38 films. If the whole process of opening and loading new films is carried out in a dark bag, and the first two films are wound before winding, then 40 films can be shot, that is, the first two films that have been wound are usually wasted. The above is the actual experience in Leica M film machine. Nikon FM's wide body means more film waste, which should be between 38 and 39. I tried the Minogue GT camera, and the width of the camera body is less than 2/3 of that of the conventional film camera, so I saved more film. I tried to make 42 movies.