In quantum field theory, photons and neutrinos are elementary particles that are described as quanta or excitations of their respective fields. The number of quanta that can fit inside another quantum, such as a photon, is not a well-defined concept in this context.
Photons are quanta of the electromagnetic field, and they do not have a finite size or spatial extent in the classical sense. Similarly, neutrinos are elementary particles that are described as excitations of the neutrino field. They are thought to be point-like particles with no internal structure.
When we talk about the number of particles or quanta, it is typically in terms of the number of individual photons or neutrinos present in a given state or interaction process. The number of particles is determined by the specific conditions and properties of the system under consideration, such as the energy, momentum, and other quantum numbers.
In summary, the concept of "fitting" a certain number of neutrino-photon quanta inside a regular photon quanta is not applicable within the framework of quantum field theory. The number of particles or quanta is determined by the properties and conditions of the system, and there is no fixed relationship between the number of neutrino-photon quanta and a regular photon quanta.