HippAp 5(10) :ܒܩܝܛܐ ܕܝܢ ܘܒܬܫܪ̈ܝܬܐ ܛܒ ܥܣܩܐܝܬ ܡܣܝܒܪܝܢ ܠܡܐܟ̈ܠܬܐ܂ ܒܣܬܘܐ ܕܝܢ ܛܒ ܦܫܝܩܐܝܬ܂ ܘܒܬܐܕܐܐ ܬܪܝܢܐܝܬ‏ : in summer and in fall it is most difficult for them to bear food, in winter most easily, and in spring next (easily)
See the entire entry for trāyānāˀīṯ adv. in a dual manner; secondly