We look at the division of 129629 by 85 
The aim is to understand the frequency of 85 in 129629.

Advancing to step 1:
The number 85 fits into 1 0 times, leaving a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Grab the next digit (2) from the dividend, add it to 1, then carry on: 12 / 85

On to step 2:
12 divided by 85 is 0 with a remainder of 12.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 12, we get 12.
Append the next digit (9) from the dividend to 12 and continue with: 129 / 85

Step 3:
If we divide 129 by 85, we get 1 and a remainder of 44.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Deduct 85 from 129 and we're left with 44.
Grab the next digit (6) from the dividend, add it to 44, then carry on: 446 / 85

Moving on to step 4:
If we divide 446 by 85, we get 5 and a remainder of 21.
The next digit of our result is 5. 
Result so far: 15.0
Deduct 425 from 446 and we're left with 21.
Bring next digit (2) of the dividend behind the 21 and repeat the process: 212 / 85

On to step 5:
212 divided by 85 is 2 with a remainder of 42.
Write down 2 as next digit of the result. 
Result so far: 152.0
If we take 170 away from 212, we end up with 42.
Fetch the next digit (9) from the dividend, attach it to 42 and continue: 429 / 85

Going ahead to step 6:
If we divide 429 by 85, we get 5 and a remainder of 4.
Record the quotient 5 as the next digit in the result. 
Result so far: 1525.0
Deduct 425 from 429 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 7:
85 can be fit into 40 0 times, resulting in a remainder of 40.
Put 0 as the next digit of the answer. 
Result so far: 1525.0
Deduct 0 from 40 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 8:
If we divide 400 by 85, we get 4 and a remainder of 60.
Use 4 as the next digit of our solution. 
Result so far: 1525.04
Subtracting 340 from 400 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.

Advancing to step 9:
The number 85 fits into 600 7 times, leaving a remainder of 5.
Record the quotient 7 as the next digit in the result. 
Result so far: 1525.047
If we subtract 595 from 600, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Advancing to step 10:
If we divide 50 by 85, we get 0 and a remainder of 50.
Put 0 as the next digit of the answer. 
Result so far: 1525.047
Subtract 0 from 50 to get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Moving on to step 11:
If we divide 500 by 85, we get 5 and a remainder of 75.
Record the quotient 5 as the next digit in the result. 
Result so far: 1525.04705
If we take 425 away from 500, we end up with 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Going ahead to step 12:
750 divided by 85 is 8 with a remainder of 70.
Write down 8 as next digit of the result. 
Result so far: 1525.047058
If we take 680 away from 750, we end up with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Moving on to step 13:
When dividing 700 by 85, we get 8 with a remainder of 20.
The next digit of our result is 8. 
Result so far: 1525.0470588
If we take 680 away from 700, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

The final result is 1525.0470588 with a remainder of 2e-07.