I always get confused between the different terms for parts of a compound leaf so I have attempted to draw them out as an aide memoire
A trichomanes is a good example of a pinnate blade, with each leaflet a pinna.
Each pinna is now sub divided so that each leaflet is now a pinnule. e.g. Polystichum setiferum Soft Shield fern
e.g. Pteridium aquilinum and D dilitata has 2-3 pinnate blade