74521584 divided by 170 
The aim is to understand the frequency of 170 in 74521584.

Advancing to step 1:
The number 170 fits into 7 0 times, leaving a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Take the next digit (4) from the dividend and append it to 7, then repeat: 74 / 170

Advancing to step 2:
The number 170 fits into 74 0 times, leaving a remainder of 74.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 74 and we're left with 74.
Bring next digit (5) of the dividend behind the 74 and repeat the process: 745 / 170

On to step 3:
170 can be fit into 745 4 times, resulting in a remainder of 65.
The next digit of our result is 4. 
Result so far: 4.0
Subtract 680 from 745 to get 65.
Take the next digit (2) from the dividend and append it to 65, then repeat: 652 / 170

Let's proceed to step 4:
If we divide 652 by 170, we get 3 and a remainder of 142.
The number 3 becomes the next digit in our result. 
Result so far: 43.0
Subtract 510 from 652 to get 142.
Take the next digit (1) from the dividend and append it to 142, then repeat: 1421 / 170

Advancing to step 5:
170 can be fit into 1421 8 times, resulting in a remainder of 61.
Use 8 as the next digit of our solution. 
Result so far: 438.0
If we take 1360 away from 1421, we end up with 61.
Take the next digit (5) from the dividend and append it to 61, then repeat: 615 / 170

On to step 6:
When dividing 615 by 170, we get 3 with a remainder of 105.
Record the quotient 3 as the next digit in the result. 
Result so far: 4383.0
Subtract 510 from 615 to get 105.
Bring next digit (8) of the dividend behind the 105 and repeat the process: 1058 / 170

Step 7:
The number 170 fits into 1058 6 times, leaving a remainder of 38.
Write down 6 as next digit of the result. 
Result so far: 43836.0
Subtracting 1020 from 1058 leaves us with 38.
Take the next digit (4) from the dividend and append it to 38, then repeat: 384 / 170

On to step 8:
170 can be fit into 384 2 times, resulting in a remainder of 44.
Record the quotient 2 as the next digit in the result. 
Result so far: 438362.0
If we take 340 away from 384, we end up with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Step 9:
440 divided by 170 is 2 with a remainder of 100.
The number 2 becomes the next digit in our result. 
Result so far: 438362.2
If we subtract 340 from 440, we get 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Advancing to step 10:
170 goes into 1000 5 times with a remainder of 150.
Record the quotient 5 as the next digit in the result. 
Result so far: 438362.25
Deduct 850 from 1000 and we're left with 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

Let's proceed to step 11:
The number 170 fits into 1500 8 times, leaving a remainder of 140.
Use 8 as the next digit of our solution. 
Result so far: 438362.258
Deduct 1360 from 1500 and we're left with 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Moving on to step 12:
170 can be fit into 1400 8 times, resulting in a remainder of 40.
The number 8 becomes the next digit in our result. 
Result so far: 438362.2588
If we take 1360 away from 1400, we end up 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.

The final result is 438362.2588 with a remainder of 0.0004.