Per a TOI article published on 2015:
According to a study/survey by executive search firm Executive Access India =>
64% of respondents held roles for less than – 5 years
35% have held current tenures for less than – 2 years (3.8 million roughly by 2011 stats shared earlier)
12% were what a decade on their records which is anticipated to go south bound given the newer/younger generational characteristics (instant gratification / less loyal-emotional, more self-oriented). Alarmingly, number of people delivering shorter tenures in an organisation is as high as – 88% (10 million by 2011 stats)
Per the same source, there was/is a 50-50 split between replacement hiring and fresh hiring and the former had risen to 60% around then since a year back then.
Can we say 3-6 million (50 lakhs median) corporate employees are planning or looking for a job change every year (4 lakhs/month)?
Indian workforce => 400 million strong
Private or Organised Sector (enterprises with 10+ workers) => 11.45 million (11.45 / 400 => 2.9% – would assume YoY increase)
Govt => 17.61 million (17.61 / 400 => 4.4% or 3 – 5.5% considering shrinks/expands)
Based on RBI data till 2012, size of formal sector is about 6% (Government + Private Sector). Rest 94% are in the informal sector.
Here are some more insights and may be related to your ask on other nations: https://tradingeconomics.com/india/employed-persons