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надбавка за выслугу лет stresses
gen.	seniority pay; long-service bonus
busin.	longevity increment
econ.	long service bonus; seniority bonus
lab.law.	seniority supplement (sankozh)
logist.	longevity pay
Makarov.	long-service pay
mil., jarg.	fogy (к денежному содержанию)
mil., lingo	fogey (MichaelBurov); fogy (MichaelBurov); fogey pay (MichaelBurov); fogy pay (MichaelBurov)
nautic.	loyalty bonus (academic.ru kurzova)
надбавка к денежному содержанию за выслугу лет
mil.	longevity increment
mil., jarg.	fogey

надбавка за выслугу лет: 9 phrases in 3 subjects

Business	1
Law	1
Military	7