you can do this making a loop :
local jobs = {'police', 'ems', 'mechanic', 'tuner'}
local dutyCounts = {}
for _, job in ipairs(jobs) do
local count = QBCore.Functions.GetDutyCount(job)
dutyCounts[job] = count
end
for job, count in pairs(dutyCounts) do
print('Currently ' .. count .. ' ' .. job .. ' on duty.')
end