The phrase "absolutely insignificant" is correct and usable in written English.
It can be used to emphasize that something is of no importance or value at all.
Example: "In the grand scheme of things, his contribution to the project was absolutely insignificant."
Alternatives: "completely trivial" or "utterly inconsequential".
The number of Jews who exist today in Spain is absolutely insignificant.
"The conversion rate of those blue links is absolutely insignificant," Mr. Klenner said.
And each winter, in a moment that is absolutely insignificant to a moose, that entire summer's effort is ripped, chewed and digested, along with thousands of other twigs.
The effect of additional longitudinal modes is absolutely insignificant in both the driven and companion mode responses.
The damage that this university has incurred is absolutely insignificant to that of the victims.
I don't own a scale, but I can say I absolutely lost the not-insignificant weight I gained over the holidays.
Today, a textbook of plant science will almost exclusively tell you about the model plant Arabidopsis thaliana - thale cress - an insignificant weed of absolutely no medical, agricultural or horticultural value.
But in between some lively chatter about his creative process and personal life, O'Brien took a brief break to offer us readers an important reminder about our own lives namely, that they are insignificant and mean absolutely nothing to the cold and indifferent universe.
The effect is mesmerising, and makes being insignificant and human feel absolutely wonderful.
The Record and Guide called the cupolas "ineffectual and insignificant" and said that the huge blank side walls were "absolutely inexpressive and vacuous".
When we view the training intensity, we find insignificant effects in both sectors but the negative coefficient is absolutely larger in competitive sectors.
