We used the Mutagenesis dataset of 230 molecules, where each example is repeated 10 times to make more accurate timings possible and to have a better idea of the effect on larger datasets. We used three different language biases. 'small' is a language bias that was chosen so as to generate a limited number of refinements (i.e., a relatively small branching factor in the search lattice); this allows us to generate query packs that are relatively deep but narrow. 'medium' and 'large' use broader but more shallow packs. Table 3 summarises the number of queries and the number of frequent queries found for each level in the different languages.
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