We're dividing 71501638 by 356 
The aim is to understand the frequency of 356 in 71501638.

On to step 1:
If we divide 7 by 356, we get 0 and a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Take the next digit (1) from the dividend and append it to 7, then repeat: 71 / 356

Advancing to step 2:
356 can be fit into 71 0 times, resulting in a remainder of 71.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 71 after subtracting 0 from 71.
Take the next digit (5) from the dividend and append it to 71, then repeat: 715 / 356

Let's proceed to step 3:
356 goes into 715 2 times with a remainder of 3.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtract 712 from 715 to get 3.
Fetch the next digit (0) from the dividend, attach it to 3 and continue: 30 / 356

Moving on to step 4:
356 can be fit into 30 0 times, resulting in a remainder of 30.
Write down 0 as next digit of the result. 
Result so far: 20.0
If we take 0 away from 30, we end up with 30.
Grab the next digit (1) from the dividend, add it to 30, then carry on: 301 / 356

Step 5:
The number 356 fits into 301 0 times, leaving a remainder of 301.
The number 0 becomes the next digit in our result. 
Result so far: 200.0
The remainder is 301 after subtracting 0 from 301.
Fetch the next digit (6) from the dividend, attach it to 301 and continue: 3016 / 356

Going ahead to step 6:
When dividing 3016 by 356, we get 8 with a remainder of 168.
Put 8 as the next digit of the answer. 
Result so far: 2008.0
Subtract 2848 from 3016 to get 168.
Append the next digit (3) from the dividend to 168 and continue with: 1683 / 356

Let's proceed to step 7:
1683 divided by 356 is 4 with a remainder of 259.
Put 4 as the next digit of the answer. 
Result so far: 20084.0
If we subtract 1424 from 1683, we get 259.
Append the next digit (8) from the dividend to 259 and continue with: 2598 / 356

Advancing to step 8:
When dividing 2598 by 356, we get 7 with a remainder of 106.
Put 7 as the next digit of the answer. 
Result so far: 200847.0
Deduct 2492 from 2598 and we're left with 106.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1060, and continue the process.

Advancing to step 9:
If we divide 1060 by 356, we get 2 and a remainder of 348.
The number 2 becomes the next digit in our result. 
Result so far: 200847.2
Subtracting 712 from 1060 leaves us with 348.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3480, and continue the process.

Advancing to step 10:
356 can be fit into 3480 9 times, resulting in a remainder of 276.
The next digit of our result is 9. 
Result so far: 200847.29
Deduct 3204 from 3480 and we're left with 276.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2760, and continue the process.

Let's proceed to step 11:
2760 divided by 356 is 7 with a remainder of 268.
The next digit of our result is 7. 
Result so far: 200847.297
The remainder is 268 after subtracting 2492 from 2760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2680, and continue the process.

Going ahead to step 12:
When dividing 2680 by 356, we get 7 with a remainder of 188.
Put 7 as the next digit of the answer. 
Result so far: 200847.2977
Subtract 2492 from 2680 to get 188.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1880, and continue the process.

The final outcome is 200847.2977, with a leftover of 0.00188.