When on a winning streak, you should make the most of it. Just hurry up, they say. Are you on Telegram? He outlined detailed plans in Parliament, telling lawmakers that there would be four stages, with a minimum of five weeks between each stage. They looked just like the ones we saw  also in colour  after NASA's Viking spacecraft did the same trip in 1976.
The minimum of 5 weeks between each stage is 1/4th of a decade.
( z0 product-of :op ( z1 at-least :op ( z2 temporal-quantity :quant 5 :time ( z3 between :op ( z4 stage :mod ( z5 each ) ) ) :unit ( z6 week ) ) ) :op "1/4" :op ( z7 temporal-quantity :quant 1 :unit ( z8 decade ) ) )
(z0 / product-of
    :op1 (z1 / at-least
             :op1 (z2 / temporal-quantity
                      :quant 5
                      :time (z3 / between
                                :op1 (z4 / stage
                                         :mod (z5 / each)))
                      :unit (z6 / week)))
    :op1 "1/4"
    :op2 (z7 / temporal-quantity
             :quant 1
             :unit (z8 / decade)))
The minimum of 5 weeks between each stage is 1/4 th of a decade .
z2 :quant 2
z1 :op1 z2
z2 :unit z6
z2 :time z3
z4 :mod z5
z3 :op1 z4
z0 :op1 z1
z0 :op1 1
z7 :quant 0
z0 :op2 z7
z7 :unit z8