Figure 1.

Example of motif Δ-occurrence in a temporal graph T, given Δ = 6. Motif Q₁ has exactly one Δ-occurrence in T, which is the subgraph formed by nodes and edges colored in red. Motif Q₂, instead, does not Δ-occur in T. In fact, the subgraph with blue nodes and blue edges is isomorphic to Q₂ and respects the chronological order imposed by Q₂'s edges, but its edges are not observed within the time window Δ.