87860872 ÷ 591 
The aim is to understand the frequency of 591 in 87860872.

On to step 1:
591 goes into 8 0 times with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Include the next digit (7) from the dividend after 8, then repeat: 87 / 591

Going ahead to step 2:
If we divide 87 by 591, we get 0 and a remainder of 87.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 87, we end up with 87.
Append the next digit (8) from the dividend to 87 and continue with: 878 / 591

Going ahead to step 3:
878 divided by 591 is 1 with a remainder of 287.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 287 after subtracting 591 from 878.
Fetch the next digit (6) from the dividend, attach it to 287 and continue: 2876 / 591

Advancing to step 4:
2876 divided by 591 is 4 with a remainder of 512.
Put 4 as the next digit of the answer. 
Result so far: 14.0
The remainder is 512 after subtracting 2364 from 2876.
Take the next digit (0) from the dividend and append it to 512, then repeat: 5120 / 591

Going ahead to step 5:
When dividing 5120 by 591, we get 8 with a remainder of 392.
The next digit of our result is 8. 
Result so far: 148.0
The remainder is 392 after subtracting 4728 from 5120.
Grab the next digit (8) from the dividend, add it to 392, then carry on: 3928 / 591

Advancing to step 6:
The number 591 fits into 3928 6 times, leaving a remainder of 382.
Record the quotient 6 as the next digit in the result. 
Result so far: 1486.0
Deduct 3546 from 3928 and we're left with 382.
Take the next digit (7) from the dividend and append it to 382, then repeat: 3827 / 591

Moving on to step 7:
591 goes into 3827 6 times with a remainder of 281.
Write down 6 as next digit of the result. 
Result so far: 14866.0
Deduct 3546 from 3827 and we're left with 281.
Bring next digit (2) of the dividend behind the 281 and repeat the process: 2812 / 591

Going ahead to step 8:
If we divide 2812 by 591, we get 4 and a remainder of 448.
Record the quotient 4 as the next digit in the result. 
Result so far: 148664.0
Subtract 2364 from 2812 to get 448.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4480, and continue the process.

On to step 9:
When dividing 4480 by 591, we get 7 with a remainder of 343.
Put 7 as the next digit of the answer. 
Result so far: 148664.7
If we take 4137 away from 4480, we end up with 343.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3430, and continue the process.

Going ahead to step 10:
591 can be fit into 3430 5 times, resulting in a remainder of 475.
The number 5 becomes the next digit in our result. 
Result so far: 148664.75
Deduct 2955 from 3430 and we're left with 475.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4750, and continue the process.

Let's proceed to step 11:
When dividing 4750 by 591, we get 8 with a remainder of 22.
Write down 8 as next digit of the result. 
Result so far: 148664.758
Subtract 4728 from 4750 to get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Advancing to step 12:
If we divide 220 by 591, we get 0 and a remainder of 220.
Use 0 as the next digit of our solution. 
Result so far: 148664.758
If we take 0 away from 220, we end up with 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

Let's proceed to step 13:
2200 divided by 591 is 3 with a remainder of 427.
Record the quotient 3 as the next digit in the result. 
Result so far: 148664.75803
Subtract 1773 from 2200 to get 427.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4270, and continue the process.

Going ahead to step 14:
591 can be fit into 4270 7 times, resulting in a remainder of 133.
Record the quotient 7 as the next digit in the result. 
Result so far: 148664.758037
If we take 4137 away from 4270, we end up with 133.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1330, and continue the process.

Advancing to step 15:
The number 591 fits into 1330 2 times, leaving a remainder of 148.
The next digit of our result is 2. 
Result so far: 148664.7580372
If we take 1182 away from 1330, we end up with 148.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1480, and continue the process.

Advancing to step 16:
When dividing 1480 by 591, we get 2 with a remainder of 298.
The number 2 becomes the next digit in our result. 
Result so far: 148664.75803722
Deduct 1182 from 1480 and we're left with 298.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2980, and continue the process.

After the division, we end up with 148664.75803722 and a remainder of 2.98e-07.