The population of 60 million ensures over a shortish period enough incidents for statistical purposes.
Not that he will be left to cope with a plain text, plus perhaps a shortish editorial preface.
You can have periods, shortish periods, in which people will not spend at the usual rate, when they think that prices are going to fall.
If a man is fired with the ambition to do well in this business, a shortish interim period will do him no harm.
The house next door is let on a repairing lease for a shortish term of years.
We can fairly easily predict over a shortish period of time what is going to be the energy consumption.
He wants a shortish statistical summary of needs, accompanied by observations and suggestions.
From that point of view a shortish period is probably wise in order to get the review under way.
