Actually there are 2. Like you, I often read different as 2 syllables, but it is three: diff-er-ent.
scientests is also 3 syllables: sci-en-tests.
It is possible to write iambic tetrameter using 9 syllables. Even Frost himself has used it in his
work. These are unaccented syllables at the beginning, or end of a line.
If I write:
Up North they say the ice is melting,
With sleeting rain, the hail is pelting.
These are 9 syllable lines, but it is perfect iambic tetrameter. Poe was another that often used this.
It looks as though you are still struggling with meter. I too had a hard time getting a grasp on this
concept, until I read Steele's dissertation on meter. In this he explains that each foot is an individual
entity, independent of the other feet in a line. I suddenly realized that all I need do is divide a line up
into its individual feet and simply concentrate on one foot at a time.
If I take the first line of yout poem:
"It could maybe take a long time."
And divide it up into the individual feet of iambic meter. I get:
It could / maybe / take a / long time.
Here you have three trochee and a spondee. We can get into semantics later, but, for now, lets just
concentrate on the meter. The first foot is easy to fix by simply changing 'it could" to "could it", but
the next foot "maybe" is not as easy. So I know that I will need to find a different way to express this foot.
Nothing comes to mind, so I go to the web site:
I type the word "maybe" into the word box, then click on the down arrow next to the function box and select
"Find related words". Then I click the "Go get it!" button. There are a couple of words that express
"maybe" in iambic meter "perhaps" and 'perchance". I like "perchance" so I will use that. I now have:
"Could it, perchance,"
And half of the line is written.
There are several ways to fix the next foot "take a". You could simply change "a" to a pronoun "us", but that
might require that you still use "a" in the next foot. You are using "take" to express the thought "employ"
So, again I go to rhymezone to search for words related to "take" and find several. The two that I
feel best describes what I want to say are "demand" and "require" for simplicity's sake lets use "require"
In the last foot "long time" it is too difficult to distinguish where the stress belongs in this foot. Again I go to
rhymezone and search for words related to "long time" I see the word "years". Hmmm
"some years" would express the same thing in better iambic meter, so I'll use that instead.
Now I have:
"Could it, perchance, require some years"
This expresses exactly what you are trying to say in the first line of your poem in iambic tetrameter.