Results from this analysis show a temporal effect of context usage. The temporal nature differs between contexts, where some appear consistently throughout time, while others exhibit periods of short popularity. Chemists reporting in our ELNs, use specific contexts for eight years on average, and the average longest range of years a context was used is six. It shows that contexts usage varies from year to year. For instance, the top-ranking context emerged around 2015, which replaced the context ranked second, used primarily before 2015. Taken together, these observations indicate influence from a variety of different factors, for example, the appearance of new conditions in the scientific literature inciting the adoption of new laboratory strategies or the hiring of new staff having, for instance, different skills or habits. Indeed, there is intense research focus on finding new conditions, especially ligands and catalysts, in the field of the Buchwald-Hartwig reaction. Additionally, the internal availability of chemicals such as catalysts and ligands may also guide the context choice in some synthesis projects. The temporal characteristics of the dataset have not been considered in previous modeling studies, although none have attempted to create a model specifically for Buchwald-Hartwig reactions. Still, it is likely that the same trends can be observed for other reaction classes.