21714622 ÷ 858 
The aim is to understand the frequency of 858 in 21714622.

Moving on to step 1:
The number 858 fits into 2 0 times, leaving a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 858

Step 2:
If we divide 21 by 858, we get 0 and a remainder of 21.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 21 to get 21.
Append the next digit (7) from the dividend to 21 and continue with: 217 / 858

Let's proceed to step 3:
If we divide 217 by 858, we get 0 and a remainder of 217.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 217 to get 217.
Append the next digit (1) from the dividend to 217 and continue with: 2171 / 858

Advancing to step 4:
858 goes into 2171 2 times with a remainder of 455.
Write down 2 as next digit of the result. 
Result so far: 2.0
If we subtract 1716 from 2171, we get 455.
Append the next digit (4) from the dividend to 455 and continue with: 4554 / 858

Moving on to step 5:
When dividing 4554 by 858, we get 5 with a remainder of 264.
Use 5 as the next digit of our solution. 
Result so far: 25.0
If we subtract 4290 from 4554, we get 264.
Bring next digit (6) of the dividend behind the 264 and repeat the process: 2646 / 858

Moving on to step 6:
858 can be fit into 2646 3 times, resulting in a remainder of 72.
Use 3 as the next digit of our solution. 
Result so far: 253.0
Subtracting 2574 from 2646 leaves us with 72.
Grab the next digit (2) from the dividend, add it to 72, then carry on: 722 / 858

Advancing to step 7:
858 can be fit into 722 0 times, resulting in a remainder of 722.
Put 0 as the next digit of the answer. 
Result so far: 2530.0
Subtract 0 from 722 to get 722.
Take the next digit (2) from the dividend and append it to 722, then repeat: 7222 / 858

On to step 8:
When dividing 7222 by 858, we get 8 with a remainder of 358.
Record the quotient 8 as the next digit in the result. 
Result so far: 25308.0
Subtract 6864 from 7222 to get 358.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3580, and continue the process.

Let's proceed to step 9:
When dividing 3580 by 858, we get 4 with a remainder of 148.
The next digit of our result is 4. 
Result so far: 25308.4
Deduct 3432 from 3580 and we're left 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.

Going ahead to step 10:
If we divide 1480 by 858, we get 1 and a remainder of 622.
Put 1 as the next digit of the answer. 
Result so far: 25308.41
Deduct 858 from 1480 and we're left with 622.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6220, and continue the process.

On to step 11:
858 goes into 6220 7 times with a remainder of 214.
Record the quotient 7 as the next digit in the result. 
Result so far: 25308.417
Deduct 6006 from 6220 and we're left with 214.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2140, and continue the process.

On to step 12:
858 can be fit into 2140 2 times, resulting in a remainder of 424.
Put 2 as the next digit of the answer. 
Result so far: 25308.4172
Subtract 1716 from 2140 to get 424.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4240, and continue the process.

On to step 13:
858 can be fit into 4240 4 times, resulting in a remainder of 808.
The number 4 becomes the next digit in our result. 
Result so far: 25308.41724
Subtract 3432 from 4240 to get 808.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8080, and continue the process.

Moving on to step 14:
If we divide 8080 by 858, we get 9 and a remainder of 358.
Write down 9 as next digit of the result. 
Result so far: 25308.417249
Deduct 7722 from 8080 and we're left with 358.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3580, and continue the process.

On to step 15:
858 goes into 3580 4 times with a remainder of 148.
Use 4 as the next digit of our solution. 
Result so far: 25308.4172494
If we subtract 3432 from 3580, we get 148.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1480, and continue the process.

Step 16:
When dividing 1480 by 858, we get 1 with a remainder of 622.
The number 1 becomes the next digit in our result. 
Result so far: 25308.41724941
Subtract 858 from 1480 to get 622.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6220, and continue the process.

The final outcome is 25308.41724941, with a leftover of 6.22e-07.