The phrase "a long time lag" is correct and usable in written English.
It can be used to describe a significant delay or interval between two events or actions.
Example: "There was a long time lag between the initial proposal and the final decision."
Alternatives: "a significant delay" or "an extended interval".
One of the difficulties of dealing with climate change is that there is a long time lag in the system.
In many diseases, vomiting may not be preceded by nausea at all, and in others there may be a long time lag between the two.
People do not realise that mental health problems can be treated – there is a long time lag.
One of the challenges of analysing and modelling suicides from a macroscopic perspective is a long time lag in their reporting in official statistics.
This process – from microcosm experiment to the development of practical application – has previously been influential but also has a long time lag.
But this stigma is greatly compounded by causes 2) and 3). 2) People do not realise that mental health problems can be treated – there is a long time lag. 3) The facilities are simply not available.
"The problem with assessing a species like orangutans is there is such a long time-lag effect," Marshall said.
Interestingly, Masuda and Tsukamoto (1998) also analyzed the schooling capacity and the OMR using striped jack (Pseudocaranx dentex) juveniles and demonstrated that there is a long time-lag between the onset of the OMR (body length 4 6 mm) and that of schooling (body length 16>mm) [24].
There was a long time-lag between drawing of the serum sample and the occurrence of the carcinoma and some women may have acquired their infection after the drawing of the serum sample.
Third, there was a relatively long time lag between the screening and diagnostic phase.
The perceived long time lag between instituting an intervention in early life and detecting a beneficial effect on NCD incidence in adults has inevitably reduced the sense of urgency in implementing such interventions, particularly in the context of short-term outcomes such as maternal or child mortality and communicable disease.
