We look at the division of 15581673 by 84 
The aim is to understand the frequency of 84 in 15581673.

Moving on to step 1:
The number 84 fits into 1 0 times, leaving a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Take the next digit (5) from the dividend and append it to 1, then repeat: 15 / 84

Advancing to step 2:
The number 84 fits into 15 0 times, leaving a remainder of 15.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 15, we get 15.
Bring next digit (5) of the dividend behind the 15 and repeat the process: 155 / 84

Advancing to step 3:
84 goes into 155 1 times with a remainder of 71.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 84 from 155 and we're left with 71.
Grab the next digit (8) from the dividend, add it to 71, then carry on: 718 / 84

Advancing to step 4:
84 goes into 718 8 times with a remainder of 46.
Put 8 as the next digit of the answer. 
Result so far: 18.0
Subtracting 672 from 718 leaves us with 46.
Fetch the next digit (1) from the dividend, attach it to 46 and continue: 461 / 84

On to step 5:
If we divide 461 by 84, we get 5 and a remainder of 41.
The number 5 becomes the next digit in our result. 
Result so far: 185.0
Subtract 420 from 461 to get 41.
Append the next digit (6) from the dividend to 41 and continue with: 416 / 84

Let's proceed to step 6:
If we divide 416 by 84, we get 4 and a remainder of 80.
Put 4 as the next digit of the answer. 
Result so far: 1854.0
If we subtract 336 from 416, we get 80.
Bring next digit (7) of the dividend behind the 80 and repeat the process: 807 / 84

Moving on to step 7:
If we divide 807 by 84, we get 9 and a remainder of 51.
The number 9 becomes the next digit in our result. 
Result so far: 18549.0
Subtracting 756 from 807 leaves us with 51.
Take the next digit (3) from the dividend and append it to 51, then repeat: 513 / 84

Moving on to step 8:
513 divided by 84 is 6 with a remainder of 9.
Record the quotient 6 as the next digit in the result. 
Result so far: 185496.0
The remainder is 9 after subtracting 504 from 513.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 9:
When dividing 90 by 84, we get 1 with a remainder of 6.
Record the quotient 1 as the next digit in the result. 
Result so far: 185496.1
Subtract 84 from 90 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 10:
When dividing 60 by 84, we get 0 with a remainder of 60.
Write down 0 as next digit of the result. 
Result so far: 185496.1
Subtracting 0 from 60 leaves us with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

On to step 11:
When dividing 600 by 84, we get 7 with a remainder of 12.
Put 7 as the next digit of the answer. 
Result so far: 185496.107
If we subtract 588 from 600, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 12:
If we divide 120 by 84, we get 1 and a remainder of 36.
Put 1 as the next digit of the answer. 
Result so far: 185496.1071
The remainder is 36 after subtracting 84 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Step 13:
If we divide 360 by 84, we get 4 and a remainder of 24.
The number 4 becomes the next digit in our result. 
Result so far: 185496.10714
The remainder is 24 after subtracting 336 from 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 14:
When dividing 240 by 84, we get 2 with a remainder of 72.
Use 2 as the next digit of our solution. 
Result so far: 185496.107142
Subtract 168 from 240 to get 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Going ahead to step 15:
When dividing 720 by 84, we get 8 with a remainder of 48.
Put 8 as the next digit of the answer. 
Result so far: 185496.1071428
Subtract 672 from 720 to get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Advancing to step 16:
84 can be fit into 480 5 times, resulting in a remainder of 60.
Write down 5 as next digit of the result. 
Result so far: 185496.10714285
If we subtract 420 from 480, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

After the division, we end up with 185496.10714285 and a remainder of 6e-08.